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550 Nouns That Start With U

Part of Speech:
Word Definitions Synonyms
u (noun) the 21st letter of the Roman alphabet Synonyms: U
uakari (noun) medium-sized tree-dwelling monkey of the Amazon basin; only New World monkey with a short tail
ubiety (noun) the state of existing and being localized in space
ubiquinone (noun) any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration Synonyms: coenzyme Q
ubiquitousness (noun) the state of being everywhere at once (or seeming to be everywhere at once) Synonyms: omnipresence, ubiquity
ubiquity (noun) the state of being everywhere at once (or seeming to be everywhere at once) Synonyms: omnipresence, ubiquitousness
udder (noun) mammary gland of bovids (cows and sheep and goats) Synonyms: bag
udometer (noun) gauge consisting of an instrument to measure the quantity of precipitation Synonyms: pluviometer, rain gage, rain gauge
ugli (noun) large sweet juicy hybrid between tangerine and grapefruit having a thick wrinkled skin Synonyms: tangelo, ugli fruit
ugliness (noun) qualities of appearance that do not give pleasure to the senses
(noun) the quality of being wicked Synonyms: nefariousness, vileness, wickedness
uintathere (noun) a variety of dinocerate Synonyms: dinoceras
ukase (noun) an edict of the Russian tsar
uke (noun) a small guitar having four strings Synonyms: ukulele
ukulele (noun) a small guitar having four strings Synonyms: uke
ulalgia (noun) pain in the gums
ulama (noun) the body of Mullahs (Muslim scholars trained in Islam and Islamic law) who are the interpreters of Islam's sciences and doctrines and laws and the chief guarantors of continuity in the spiritual and intellectual history of the Islamic community Synonyms: ulema
ulatrophia (noun) recession of the gums
ulcer (noun) a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue Synonyms: ulceration
ulceration (noun) the process of ulcer formation; the process of becoming ulcerated
(noun) a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue Synonyms: ulcer
ulema (noun) the body of Mullahs (Muslim scholars trained in Islam and Islamic law) who are the interpreters of Islam's sciences and doctrines and laws and the chief guarantors of continuity in the spiritual and intellectual history of the Islamic community Synonyms: ulama
ulemorrhagia (noun) bleeding of the gums
ulitis (noun) inflammation of the gums
ullage (noun) the amount that a container (as a wine bottle or tank) lacks of being full
ulna (noun) the inner and longer of the two bones of the human forearm Synonyms: elbow bone
ulster (noun) loose long overcoat of heavy fabric; usually belted
ulteriority (noun) the quality of being ulterior
ultima (noun) the last syllable in a word
ultimacy (noun) the state or degree of being ultimate; the final or most extreme in degree or size or time or distance Synonyms: ultimateness
ultimate (noun) the finest or most superior quality of its kind
ultimateness (noun) the state or degree of being ultimate; the final or most extreme in degree or size or time or distance Synonyms: ultimacy
ultimatum (noun) a final peremptory demand
ultracentrifugation (noun) centrifugation at very high speeds
ultracentrifuge (noun) a high speed centrifuge used to determine the relative molecular masses of large molecules in high polymers and proteins
ultraconservative (noun) an extreme conservative; an opponent of progress or liberalism Synonyms: extreme right-winger, reactionary
ultramarine (noun) a vivid blue to purple-blue color
(noun) blue pigment made of powdered lapis lazuli Synonyms: ultramarine blue
ultramicroscope (noun) light microscope that uses scattered light to show particles too small to see with ordinary microscopes Synonyms: dark-field microscope
ultramodernity (noun) The property of being extremely modern.
ultramontane (noun) a Roman Catholic who advocates ultramontanism (supreme papal authority in matters of faith and discipline)
ultramontanism (noun) (Roman Catholic Church) the policy that the absolute authority of the church should be vested in the pope
ultranationalism (noun) fanatical patriotism Synonyms: chauvinism, jingoism, superpatriotism
ultrasonography (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs Synonyms: echography, sonography, ultrasound
ultrasound (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs Synonyms: echography, sonography, ultrasonography
(noun) very high frequency sound; used in ultrasonography
ultraviolet (noun) radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays Synonyms: ultraviolet illumination, ultraviolet light, ultraviolet radiation, UV
ululation (noun) a long loud emotional utterance Synonyms: howl, howling
umbel (noun) flat-topped or rounded inflorescence characteristic of the family Umbelliferae in which the individual flower stalks arise from about the same point; youngest flowers are at the center
umbellifer (noun) any of numerous aromatic herbs of the family Umbelliferae Synonyms: umbelliferous plant
umber (noun) a medium brown to dark-brown color Synonyms: burnt umber, chocolate, coffee, deep brown
(noun) an earth pigment
umbilical (noun) membranous duct connecting the fetus with the placenta Synonyms: umbilical cord
umbilicus (noun) a scar where the umbilical cord was attached Synonyms: belly button, bellybutton, navel, omphalos, omphalus
umbo (noun) a slight rounded elevation where the malleus attaches to the eardrum
umbra (noun) a region of complete shadow resulting from total obstruction of light
umbrage (noun) a feeling of anger caused by being offended Synonyms: offence, offense
umbrella (noun) a formation of military planes maintained over ground operations or targets
(noun) having the function of uniting a group of similar things
(noun) a lightweight handheld collapsible canopy
umbrellawort (noun) a plant of the genus Mirabilis
umlaut (noun) a diacritical mark (two dots) placed over a vowel to indicate a change in sound in some languages
ump (noun) an official at a baseball game Synonyms: umpire
umpirage (noun) the act of umpiring Synonyms: officiating, officiation, refereeing
(noun) mediation by an umpire
umpire (noun) an official at a baseball game Synonyms: ump
(noun) someone chosen to judge and decide a disputed issue Synonyms: arbiter, arbitrator
unabridged (noun) a dictionary that has not been shortened by the omitting terms or definitions; a comprehensive dictionary Synonyms: unabridged dictionary
unacceptability (noun) unsatisfactoriness by virtue of not conforming to approved standards Synonyms: unacceptableness
unacceptableness (noun) unsatisfactoriness by virtue of not conforming to approved standards Synonyms: unacceptability
unadaptability (noun) the inability to change or be changed to fit changed circumstances
unaffectedness (noun) not affected; a personal manner that is not consciously constrained
unai (noun) relatively small fast-moving sloth with two long claws on each front foot Synonyms: Choloepus didactylus, two-toed sloth, unau
(noun) a sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot Synonyms: Choloepus hoffmanni, two-toed sloth, unau
unalterability (noun) the quality of not being alterable
(noun) the quality of being fixed and unchangeable Synonyms: fixedness
unambiguity (noun) clarity achieved by the avoidance of ambiguity Synonyms: unequivocalness
unanimity (noun) everyone being of one mind
unappetisingness (noun) the property of spoiling the appetite Synonyms: unappetizingness
unappetizingness (noun) the property of spoiling the appetite Synonyms: unappetisingness
unapproachability (noun) a disposition to be unapproachable; unfriendly and inaccessible
unary (noun) the bijective base-1 numeral system: in order to represent a number N, an arbitrarily chosen symbol representing 1 is repeated N times. Synonyms: unary numeral system
unassertiveness (noun) diffidence about self promotion
unassumingness (noun) a quality of naturalness and simplicity Synonyms: sincerity
unattainability (noun) The fact of being unattainable, of not being able to be reached or acquired.
unattainableness (noun) the state of being unattainable
unattractiveness (noun) an ugliness of appearance that is not appealing to viewers
unau (noun) relatively small fast-moving sloth with two long claws on each front foot Synonyms: Choloepus didactylus, two-toed sloth, unai
(noun) a sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot Synonyms: Choloepus hoffmanni, two-toed sloth, unai
unavailability (noun) the quality of not being available when needed
unavoidability (noun) the quality of being impossible to avoid or evade Synonyms: ineluctability
unawareness (noun) unconsciousness resulting from lack of knowledge or attention Synonyms: unknowingness
unbalance (noun) a lack of balance or state of disequilibrium Synonyms: imbalance, instability
(noun) a state of mental disturbance and disorientation Synonyms: derangement, mental unsoundness
unbecomingness (noun) the quality of being unbecoming
(noun) The state of not being flattering, attractive or appropriate.
unbelief (noun) a rejection of belief Synonyms: disbelief
unboundedness (noun) the quality of being infinite; without bound or limit Synonyms: boundlessness, infiniteness, infinitude, limitlessness
unbreakableness (noun) a consistency of something that does not break under pressure
unceremoniousness (noun) an unceremonial manner
uncertainness (noun) being unsettled or in doubt or dependent on chance Synonyms: precariousness, uncertainty
uncertainty (noun) being unsettled or in doubt or dependent on chance Synonyms: precariousness, uncertainness
(noun) the state of being unsure of something Synonyms: doubt, doubtfulness, dubiety, dubiousness, incertitude
unchangeability (noun) the quality of being unchangeable; having a marked tendency to remain unchanged Synonyms: changelessness, unchangeableness, unchangingness
unchangeableness (noun) the quality of being unchangeable; having a marked tendency to remain unchanged Synonyms: changelessness, unchangeability, unchangingness
unchangingness (noun) the quality of being unchangeable; having a marked tendency to remain unchanged Synonyms: changelessness, unchangeability, unchangeableness
uncheerfulness (noun) not conducive to cheer or good spirits
(noun) a feeling of dreary or pessimistic sadness Synonyms: cheerlessness
uncial (noun) a style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries
uncle (noun) the brother of your father or mother; the husband of your aunt
(noun) a source of help and advice and encouragement
uncleanliness (noun) lack of cleanly habits
uncleanness (noun) the state of being unsanitary Synonyms: dirtiness
unclearness (noun) incomprehensibility as a result of not being clear
uncloudedness (noun) the quality of clear water Synonyms: clarity, clearness
uncomfortableness (noun) embarrassment deriving from the feeling that others are critically aware of you Synonyms: self-consciousness, uneasiness
(noun) the state of being tense and feeling pain Synonyms: discomfort
uncommonness (noun) extraordinariness as a consequence of being rare and seldom encountered
(noun) extraordinariness as a consequence of being marked by an uncommon or superlative quality

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