124 Nouns That Start with X [with Definitions and Examples]

Nouns that start with X mostly comprise scientific and chemical terms which may or may not be a part of our routine. So, this is will turn out to be a list of unique nouns beginning with X and the applications of these words might not be as plentiful as other letters but we trust that you will be able to find a few new words that can be a part of your writing style.

As a writer, most of the time you run into new staggering words unexpectedly as everyone has their way of perceiving and interpreting different information. So, there is a good chance that you’ll discover a few operational nouns starting with X. Honestly there might not be a bunch of nouns that start with X to describe a person, refer to a state of action and describe characteristics of someone but for science students this list of nouns that start with X which carries many technical terms, scientific names of elements to enlighten the science students with the fundamentals. So, let’s read on to learn some new nouns that start with X. 

Nouns That Start with X You Always Use

You’ll come across a lot of familiar nouns that start with X in this section. After carefully reading through this list, you’ll be able to use these nouns flawlessly.

1. Xalam

• Definition: a traditional stringed musical instrument from West Africa with 1-5 strings
• Synonyms: bappe, diassare, hoddu, koliko
• Example: The xalam is commonly played in Mali.

 2. Xanthamide

• Definition: an amido derivative of xanthic acid obtained as a white crystalline substance
• Synonyms: xanthogen amide, C2H5O.CS.NH2
• Example: Xanthamide is used in some chemical experiments.

3. Xanthan

• Definition: a water-soluble natural gum produced by the fermentation of sugar with certain microorganisms
• Synonyms: binder, extender
• Example: Xanthan (E415) may be derived from maize.

4. Xanthate

• Definition: a salt or ester of xanthic acid
• Synonyms: viscose, salt
• Example: Xanthates are a group of chemicals typically used in sulphide flotation in mining applications.

5. Xanthelasma

• Definition: xanthelasma is yellowish plaques that occur most commonly near the inner canthus of the eyelid, more often on the upper lid than the lower lid
• Synonyms: fatty deposits in skin around the eyes, fatty deposits on eyelids
• Example: Xanthelasma is best treated by treating the blood fat problem through diet, exercise and medications.

6.  Xanthide

• Definition: a feebly basic compound C₅H₄N₄O₂ that occurs especially in animal or plant tissue, is derived from guanine and hypoxanthine.
• Synonyms: C₅H₄N₄O₂
• Example: Xanthide yields uric acid on oxidation.

7. Xylopolist

• Definition: a person who sells wood products
• Synonyms: timber merchant
• Example: You don’t need a degree to be a xylophonist.

8. Xanthium

• Definition: an herbaceous plant of the daisy family with broad leaves and burred fruits, native to tropical America
• Synonyms: cocklebur, Asterales
• Example: In a word, the prospect of extracts of Xanthium sibiricum in future production and practice is brilliant.

9. Xanthophyll

• Definition: a yellow coloring matter derived from the retina
• Synonyms: lutein, C₄₀H₅₆O₂
• Example: Xanthophyll from the marigold flower is a potent antioxidant.

 10. X-axis                            

• Definition: the principal or horizontal axis of a system of coordinates, points along which have a value of zero for all other coordinates
• Synonyms: horizontal axis, the abscissa
• Example: The value for the x-axis is always given first.

Nouns That Start with X You Usually Use

In this segment, we’ll cover nouns starting with X that we usually employ while writing or speaking. Let’s read on to get a better understanding of these words.

1. Xebec

• Definition: a small three-masted Mediterranean sailing ship with lateen and square sails
• Synonyms: brigantine, bugeye
• Example: The escorts consisted of a xebec of 20 guns and three gunboats.

2. Xenelasia

• Definition: a customer prohibiting stranger from residing at Sparta and empowering magistrates to expel them
• Synonyms: barbarity, prohibited
• Example: Dominant Sparta deploys the term Xenelasia as synonymous with barbarity, an entirely uncivilized condition.

 3. Xenium

• Definition: a present given among the ancient Greeks and Romans to a guest or stranger and especially to a foreign ambassador
• Synonyms: endowment, gift
• Example: Thor had no idea what sort of xenium he should provide since he wasn’t in the habit of being hospitable to houseguests.

4. Xenobiotic

• Definition: a xenobiotic substance
• Synonyms: xenos, foreigner
• Example: The body removes xenobiotics by xenobiotic metabolism.

5. Xenocrysts

• Definition: a crystal in an igneous rock which is not derived from the original magma
• Synonyms: geology, rock, stone
• Example: A magma may pick up crystals that crystallized from another magma; these crystals are called xenocrysts. 

6. Xenogamy

• Definition: fertilization of a flower by pollen from a flower on a genetically different plant
• Synonyms: genteelness, gentility
• Example: Both species of this flower use a mixed breeding system, consisting of xenogamy.

7. Xenogenesis

• Definition: the supposed generation of offspring completely and permanently different from the parent
• Synonyms: alternation of generations, heterogenesis
• Example:  The Australian babies had all died within a few weeks, suggesting that something may have gone wrong with the xenogenesis process.

8. Xenograft

• Definition: the transplant of an organ, tissue, or cells to an individual of another species
• Synonyms: allograft, autograft, heterograft
• Example: Xenograft studies provide models of skin responses in vivo.

9. Xenolith

• Definition: a piece of rock within an igneous mass which is not derived from the original magma but has been introduced from elsewhere, especially the surrounding country rock
• Synonyms: rock stone
• Example: To the east of the laguna the lavas contain angular xenoliths of more basic lava, while to the west they appear massive and lack xenoliths.

10. Xylopyrography

• Definition: the technique of making a picture or design on wood using a hot iron or another heated instrument.
• Synonym: wood printing
• Example: He is an expert in xylopyrography.

Nouns That Start with X You Often Use

It is essential to have a good perception of nouns that we often use in our conversations. Below are few such nouns starting with X.

1. Xenon

• Definition: the chemical element of atomic number 54, a member of the noble gas series
• Synonyms: inert gas, Xe
• Example: Polarised atoms of xenon are useful because they can provide the reference direction for very accurate gyroscopes.

2. Xenophilia

• Definition: an attraction to foreign peoples, cultures, or customs
• Synonyms: none
• Example: I do have a bit of xenophilia with respect to food though.

3. Xenopterygii

• Definition: a suborder of fishes including Gobiesox and allied genera
• Synonyms: fish, tuna, croaker  
• Example: Xenopterygii is an order of bony fishes that is coextensive with the family Gobiesocidae.

4. Xenotime

• Definition: a yellowish-brown mineral which occurs in some igneous rocks and consists of a phosphate of yttrium and other rare earth elements
• Synonyms: rock mineral, zircon
• Example: Xenotime and white mica were extracted from the sample.

5. Xenyl

• Definition: a univalent radical derived from biphenyl
• Synonyms: C₆H₅C₆H₄
• Example: An example of xylene is STYROLENE.

6. Xeraphim

• Definition: an old monetary unit of Bombay, equal to three-fifths of a rupee
• Synonyms: money, currency
• Example: Xerahim was a silver coin worth 300 to 360 reis.

7. Xeres

• Definition: a town in SW Spain: famous for the making of sherry
• Synonyms: town, name of a place
• Example: My uncle is from Xeres.

8. Xeroderma

• Definition: any of various diseases characterized by extreme dryness of the skin, especially a mild form of ichthyosis
• Synonyms: Ichthyosis vulgaris MIM146700, a nonspecific term for any form of dry skin
• Example: Xeroderma is caused mainly by sunlight exposure.

 9. Xerophagy

• Definition: the strictest Christian fast which is observed chiefly in the Eastern churches during lent or especially Holy Week
• Synonyms: dry meal, fast
• Example: Throughout this week, and until the Sixth Friday in Lent, one meal may be taken a day with xerophagy.

10. Xerophthalmia

• Definition: abnormal dryness of the conjunctiva and cornea of the eye, with inflammation and ridge formation, typically associated with vitamin A deficiency
• Synonyms: ophthalmology, blindness due to corneal opacity
• Example: People deficient in retinoids suffer night blindness and xerophthalmia.

Nouns That Start with X You Sometimes Use

Our daily routine makes us use some nouns more frequently than others. So let’s see a handful of these nouns beginning with X.

1. Xerophyte

• Definition: a plant that needs very little water
• Synonyms: xerophile, hydrophyte, mesophyte, desert plant
• Example: The stems of some xerophytes are dry and hard in structure, whilst others are succulent and fleshy.

2. Xerostomia

• Definition: a condition in which the salivary glands in your mouth don’t make enough saliva to keep your mouth wet
• Synonyms: dry mouth, reduced salivary flow
• Example: Our objective is to study the influence on xerostomia of radiotherapy in the treatment of head and neck cancer.

3. Xiphias

• Definition: a genus of large scombroid fishes comprising the common swordfish
• Synonyms: xiphiidae, amphibian
• Example: I can admire it as I would admire a mountain, or the Smug, or Xiphias, or some distant stars.

4. Xiphidium

• Definition: a genus of herbs in the family Haemodoraceae first described as a genus in 1775
• Synonyms: herb, haemodoraceae
• Example: Xiphidium is used in the treatment of some diseases.

5. Xiphosura

• Definition: Xiphosura is an order of arthropods related to arachnids
• Synonyms: horseshoe
• Example: The Xiphosura are marine in habit, frequenting the shore.

6. X-Mas

• Definition: another term for Christmas
• Synonyms: Christmas, Christmastime
• Example: A week intervenes between X-mas and New Year’s Day.

7. Xylographer

• Definition: an engraver on wood, especially one of the earliest wood-engravers, as of the fifteenth century.
• Synonyms: (none)
• Example: Pam is a famous xylographer.

8. X-ray 

• Definition: an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light
• Synonyms: radiogram, radiograph
• Example: The X-ray showed a slight irregularity in one lung.

9. X-wing

• Definition: The X-wing is a versatile Rebel Alliance starfighter that balances speed with firepower
• Synonyms: starfighter, A-10, swordfish
• Example: In Star Wars Battlefront you can try out many of the neat vehicles used in the movies; land speeders, X-Wing fighters, and quite a few others.

 10. Xu

• Definition: a monetary unit of Vietnam
• Synonyms: currency
• Example: One Xu equals one-hundredth of a dong.

Nouns That Start with X You Occasionally Use

Inside this part of the article, we’ll dig into noun words that start with X which are occasionally a part of our chats. This section will also bring some unique words into the light.

1. Xylem

• Definition: the vascular tissue in plants which conducts water and dissolved nutrients upwards from the root and also helps to form the woody element in the stem
• Synonyms: metaxylem, protoxylem
• Example: Xylem carried water from the root of the plant to the very center of the leaf.

2. Xylene

• Definition: a volatile liquid hydrocarbon obtained by distilling wood, coal tar, or petroleum, used in fuels and solvents and in chemical synthesis
• Synonyms: C₈H₁₀
• Example: Any dried oil can be removed using xylene.

3. Xylenol

• Definition: organic compounds
• Synonyms: (CH₃)₂C₆H₃OH
• Example: The adsorption capacity of 3,5-xylenol was found to increase with the decrease in particle size of the adsorbent.

4. Xylite

• Definition: A liquid hydrocarbon found in crude wood spirits
• Synonyms: C₅H₁₂O₅
• Example: Xylite boils at 61.5°C.

5. Xylocopa 

• Definition: a genus of carpenter bees that is the type of the family Xylocopidae
• Synonyms: carpenter bees
• Example: Xylocopa has circulatory anatomy like honeybees and bumblebees.

6. Xylograph

• Definition: a print from an engraving in wood
• Synonyms: woodcut
• Example: This temple is renowned for its collection of religious treasures, masks, musical instruments, armor, ancient weapons, and xylograph blocks used for printing prayer flags and texts.

7. Xyloid

• Definition: having the qualities or nature of wood
• Synonyms: resembling wood, woody, ligneous
• Example: Xyloid may sometimes have the tenacity and the appearance of ordinary wood but it can be seen that the combustible woody tissue has experienced a great modification. 

8. Xylophone 

• Definition: a musical instrument played by striking a row of wooden bars of graduated length with one or more small wooden or plastic beaters
• Synonyms: marimba, carillon, vibraphone, glockenspiel, musical-instrument
• Example: Emma was experimenting with atonal motifs on a xylophone and Vicky had been given a doll but had pulled the arm off.

9. Xylopyrography

• Definition: the technique of making a picture or design on wood using a hot iron or another heated instrument
• Synonyms: poker painting
• Example: Joe is an expert in xylopyrography.

10. Xyloquinone

• Definition: any of several yellow crystalline compounds obtained in general by oxidation of xylidines or xylenols; dimethyl-benzoquinone
• Synonyms: (CH₃)₂C₆H₂O₂ 
• Example: Any of a group of quinone compounds obtained by the oxidation of xylidines are know as xyloquinone.

Nouns That Start with X You Seldom Use

This segment will put forward a chunk of words that are not usually a part of casual writing and chit-chat. So, get ready to learn some brand-new and quirky nouns that start with the letter X.

1. Xylorcin

• Definition: a derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red
• Synonyms: betaorcin
• Example: Xylorcin is often used in chemical laboratories.

2. Xylose

• Definition: sugar of the pentose class which occurs widely in plants, especially as a component of hemicelluloses
• Synonyms: wood sugar
• Example: Xylose is used as a diabetic sweetener in food and beverage.

3. Xylitol

• Definition: sweet-tasting crystalline alcohol derived from xylose, present in some plant tissues and used as an artificial sweetener in foods
• Synonyms: sugar alcohol
• Example: Excessive consumption of xylitol can cause digestive side effects.

4. Xylylene

• Definition: any of several isomeric bivalent radicals C₈H₈ derived from the three xylenes by removal of one hydrogen atom from each of two carbon atoms
• Synonyms: (none)
• Example: Certain substituted derivatives of xylylenes are however highly stable.

5. Xyris

• Definition: a large genus (the type of the family Xyridaceae) of chiefly American marsh plants having mostly yellow flowers
• Synonyms: yellow-eyed grass
• Example: Xyris is found in the states of Alabama, Georgia, and Tennessee.  

6. Xyst

• Definition: a covered portico especially the one used in ancient Greece
• Synonyms: colonnade, loggia
• Example: Xyst was mostly used in ancient Greece for athletics.

7. Xanthine

• Definition: a crystalline compound found in blood and urine which is an intermediate in the metabolic breakdown of nucleic acids to uric acid
• Synonyms: (none)
• Example: Caffeine is the most important xanthine alkaloid.

8. Xenagogue 

• Definition: a tour guide
• Synonyms: docent, cicerone
• Example: While the role of the superhero in disability leadership gets overplayed, the role of xenagogue has room to grow.

9. Xenocryst

• Definition: a crystal in an igneous rock which is not derived from the original magma
• Synonyms: none
• Example: Xenocryst occurs rarely in our environment.

10. Xanthogen

• Definition:  the radical C₂H₅OCSS− derived from xanthic acid 
• Synonyms: none
• Example: Xanthogen formates are frequently used as sulfide mineral collectors.

Nouns That Start with X You Rarely Use

The majority of the X-nouns are hardly a part of our discussions and talks, however, using these can help you establish a good first impression. So, let’s see a few of these nouns.

1. Xenurine

• Definition: any armadillo of the former genus Xenurus
• Synonyms: cabassou, kabassou
• Example: Xenurines are not carnivores.

2. Xenotransplantation

• Definition: the process of grafting or transplanting organs or tissues between members of different species
• Synonyms: xenotransplant
• Example: Xenotransplantation has the potential to alleviate the critical shortage of organs for transplantation in humans.

3. Xenopus

• Definition: the African clawed frog, much used in embryological research and formerly in pregnancy testing, as it produces eggs in response to substances in the urine of a pregnant woman
• Synonyms: clawed frog
• Example: Xenopus laevis lives in warm, stagnant grassland ponds as well as in streams in arid and semi-arid regions.

4. Xenophobia

• Definition: dislike of or prejudice against people from other countries
• Synonyms: racism, ethnocentricity, racial hatred
• Example: People who express xenophobia typically believe that their culture or nation is superior.

5. Xenophile

• Definition: one attracted to foreign things
• Synonyms: none
• Example: I am not a xenophile.

6. Xenomorph

• Definition: a xenomorph is a type of alien from the science-fiction horror franchise Alien known for its grotesque appearance and parasitic form of reproduction
• Synonyms: alien
• Example: Some fans of the Alien franchise have complained that xenomorph isn’t really a good name for an unknown alien species.

7. Xylorimba

• Definition: a percussion instrument resembling the xylophone with a tubular metal resonator under each bar and an extended range which includes that of the marimba
• Synonyms: (none)
• Example: Do you know how to operate xylorimba?

8. Xenology

• Definition: the scientific study of alien biology, cultures
• Synonyms: none
• Example: Have you ever heard of the xenology department?

9. Xenophobe

• Definition: a person having a dislike of or prejudice against people from other countries
• Synonyms: antiforeign, anti-immigrant
• Example: Dwight is not a xenophobe.

10. Xenoglossy

• Definition: is the supposedly paranormal phenomenon in which a person is able to speak or write a language they could not have acquired by natural means
• Synonyms: xenoglossia
• Example: Almost all cases have been documented xenoglossy as part of a neurological problem origin.

Positive Nouns That Start with X

The last section in this article is of the positive nouns that start with X. In a formal environment it is crucial to present your opinion in a very positive way. Hence these nouns can be essential for pleasant communication.

1. X-factor 

• Definition: noteworthy quality or talent
• Synonyms: wow factor, uniqueness
• Example: Ferrari makes fewer cars using a high-quality component with expert hands, that is the X-Factor.

2. Xenas

• Definition: a confident, strong woman
• Synonyms: mighty, strong, confident
• Example: Sandra is one of the most successful business ladies, she is a xenas.

3. Xenagogue

• Definition: acting as a guide; guiding someone
• Synonyms: tour guide
• Example: He takes the form of The Xenagogue for us, and leads us into a place that is unimaginable, yet inevitable.

4. Xenismos

• Definition: offering meal (ritual)
• Synonyms: offering, ritual
• Example: He arranged xenismos for orphans of the whole city.

5. Xenodocheionology

• Definition: hotel and inn lore
• Synonyms: lore, myths
• Example: This xenodocheionology provides free shelter for the poor and the deprived.

6. Xenodochy 

• Definition: receiving of strangers
• Synonyms: hospitality, fellowship
• Example: The people of Beijing are famous for their xenodochy.

7. Xenolalia

• Definition: speaking a language you never learned
• Synonyms: multi-lingual, speaking in tongues
• Example: She traveled to Johnsonville, and reportedly experienced the gift of xenolalia and spoke the Kru language.

8. Xenomania

• Definition: the pleasure of meeting strangers
• Synonyms: passion, inclination
• Example: They treated the passengers wholeheartedly out of xenomania.

9. Xper

• Definition: someone that is an extreme programmer
• Synonyms: programmer, coder
• Example: Joe can code any program, he is an xper.

10. Xoanon 

• Definition: primitive wood statue
• Synonyms: carving, cult image
• Example: A mode of divination by movements of a xoanon of Apollo was also practiced.

Nouns That Start with X – Full List (124 words)

• X
• Xalam
• Xanthamide
• Xanthan
• Xanthate
• Xanthelasma
• Xanthide
• Xanthidium
• Xanthin
• Xanthine
• Xanthinine
• Xanthippe
• Xanthium
• Xanthochroi
• Xanthogen
• Xanthogenate
• Xanthoma
• Xanthophane
• Xanthophyll
• Xanthoprotein
• Xanthopuccine
• Xanthorhamnin
• Xanthorhiza
• Xanthorhoea
• Xanthorrhoea
• Xanthose
• Xanthosis
• Xanthoxylene
• Xanthoxylum
• X-Axis
• Xd
• Xebec
• Xeme
• Xenagogue
• Xenelasia
• Xenium
• Xenobiotic
• Xenocrysts
• Xenodocheionology
• Xenodochium
• Xenodochy
• Xenogamy
• Xenogenesis
• Xenograft
• Xenografts
• Xenolith
• Xenoliths
• Xenomania
• Xenomi
• Xenon
• Xenophile
• Xenophilia
• Xenophobe
• Xenophobia
• Xenopterygii
• Xenotime
• Xenurine
• Xenyl
• Xeraphim
• Xeres
• Xerif
• Xeriff
• Xeroderma
• Xeronate
• Xerophagy
• Xerophthalmia
• Xerophthalmy
• Xerophyte
• Xerostomia
• Xesturgy
• Xfactor
• X-Factor
• Xiphias
• Xiphidium
• Xiphiplastron
• Xiphisternum
• Xiphius
• Xiphodon
• Xiphosura
• Xiphura
• X-Mas
• Xoanon
• X-Ray
• Xu
• X-Wing
• Xylamide
• Xylanthrax
• Xylate
• Xylem
• Xylene
• Xylenol
• Xylidine
• Xylindein
• Xylite
• Xylitol
• Xylitone
• Xylobalsamum
• Xylocopa
• Xylogen
• Xylograph
• Xylographer
• Xylography
• Xyloidin
• Xylol
• Xylonite
• Xylophaga
• Xylophagan
• Xylophagides
• Xylophilan
• Xylophone
• Xylopyrography
• Xyloquinone
• Xylorcin
• Xylose
• Xylostein
• Xylotile
• Xylotrya
• Xylyl
• Xylylene
• Xyris
• Xyst
• Xystarch
• Xyster
• Xystus

Final thoughts on Nouns That Start with X

If you weren’t able to find new nouns beginning with X that would gratify your desire of polishing your communication skills then rest assured as there are plenty of other lists that will help you learn and implement a lot of imaginative and creative nouns. Most of the nouns starting with X are not monotonous so it is crucial to remember that the words in English literature will remain the same however the way people use them while writing or speaking can leave a good impact. So, make sure that you customize your writing style along with learning new words.

We know that nouns that start with X are not widely used but if you were able to find some new helpful nouns do tell us about them in the comment section.

Ps. See also positive words that start with X, adjectives that start with X and verbs that start with X.