uakari                        short-tailed, long-haired monkey

uberous                       yielding an abundance of milk; abounding

uberty                        fruitfulness, fertility; copiousness, abundance

ubiation                      the act of occupying a new place

ubication                     condition of being in a certain location

ubiety                        location; state of being in a definite place

ubiquarian                    someone who goes everywhere

ubique                        everywhere

ubiquit                       to make ubiquitous (as to turn up everywhere)

ubiquitarianism               belief that Christ is everywhere

ubity                         place or locality

ucalegon                      a neighbor whose house is on fire or has burned down

udal                          form of land tenure in Orkney and Shetland islands

udometer                      instrument for measuring rainfall

ufology                       the study of unidentified flying objects

ughten                        morning twilight

uglyography                   bad handwriting; uncouth spelling; hence, uglyographize, to spell uncouthly

ugsome                        frightful, loathsome

ugsomeness                    ugliness or the quality of being ugsome or horrible

ukase                         edict; proclamation by an autocratic government

ulatrophy                     atrophy of the gums

ulcuscle                      a small ulcer

uletic                        of, like or pertaining to the gums

uliginous                     slimy; oozy; swampy; growing in swampy places

ullage                        1. the amount which a vessel, as a cask of wine, lacks of being full; wantage; deficiency

ullage                        2. the amount (of wine) left in glasses in a restaurant

ullagone                      cry of lamentation; funeral lament

ulmaceous                     of or like elms

uloid                         resembling a scar

ulosis                        formation of a scar

ulotrichous                   having very wooly hair

ultimo                        of last month

ultimogeniture                inheritance by the youngest son

ultion                        revenge; vengeance

ultracrepidarian              of one who speaks or offers opinions on matters beyond their knowledge

ultracrepidarianism           the act or habit of talking constantly about subjects of which you know little or nothing

ultracrepidate                to criticize beyond sphere of one's knowledge

ultradian                     of physiological cycles longer than an hour and shorter than a day

ultrafidian                   going beyond faith

ultrageous                    violently extreme

ultraism                      holding extreme opinions on a subject

ultramarine                   deep blue

ultramicroscope               instrument for viewing extremely small objects

ultramontane                  south of the Alps; supporting the Pope

ultramundane                  situated beyond the world, or beyond the limits of the solar system

ultroneous                    of witnesses; relating to testimony given without citation

ululate                       lament loudly and shrilly; howl, wail

umbel                         mass of flowers springing from a single center

umbelliferous                 bearing umbels or masses of flowers springing from a single centre

umber                         brownish red

umbilical                     of, like or pertaining to the navel; related on the mother's side

umbiliciform                  shaped like a navel

umbo                          central knob or boss of a shield

umbraculiform                 shaped like an umbrella

umbraculum                    umbrella or umbrella-like structure

umbrage                       shade; foliage; offence; the feeling of being offended

umbrageous                    1. affording shade, shady; shadowy

umbrageous                    2. inclined to take offense easily; beligerant, resentful

umbratic                      shadowy; providing shade

umbratilous                   shadowy; shaded; indoor; secluded

umbril                        visor on helmet to protect the eyes from light

umbrose                       shade-giving; dusky

umtagati                      a South African wizard

unalist                       priest holding one benefice

unaneled                      without extreme unction

unasinous                     being equally stupid or assinine

unau                          the South American two-toed sloth

unberufen                     exclamation to avert ill luck following boasting

unbosom                       to pour out; to tell freely

uncate                        hooked

uncial                        of, like or pertaining to an inch or an ounce

unciform                      shaped like a hook

uncomeatable                  unattainable; inaccessible

unconsentaneous               not in agreement

unction                       anointing as right of consecration or healing; warmth of address

unctuous                      fatty, oily; rich in organic matter; marked by a smug, ingratiating and false earnestness

undaftiness                   untidiness

undate                        wavy

undecennial                   happening every eleven years

undecillion                   a large number - a one followed by either 36 or 66 zeroes.

undeify                       to deprive of the nature of a god

underbreath                   subdued voice; rumour

underbridge                   bridge carrying a road or railway

undercroft                    underground room or vault, esp under a church; crypt

undern                        light midday meal

underwit                      inferior wit; half-wit

undigenous                    created or generated by water

undight                       to take off; to doff; to undo

undine                        female water spirit

undinism                      1. psychological obsession with urine and urination

undinism                      2. the trait of having erotic thoughts when viewing or thinking of water

undulationism                 theory that light consists of waves

uneath                        difficult; distressing; hard; scarce

ungual                        of a claw, hoof, or talon; clawed

unguentary                    of, like or pertaining to unguents; one who makes or sells unguents

unguiculate                   clawed

unguiform                     shaped like a claw

unguinous                     fatty, oily

unguligrade                   walking on hoofs

unhouseled                    not having received the Eucharist shortly before death

unicity                       uniqueness; oneness

unifarious                    arranged in a single row or series

unifilar                      having only one thread or wire

unigeniture                   state or fact of being the only begotten

unigenous                     of the same origin, kind or sort

unigravida                    a woman's first pregnancy

unipara                       woman having given birth only once

uniparous                     producing only one offspring at birth

unipotent                     powerful in one direction only

unisonous                     in unison or agreement

unition                       conjunction

universalism                  belief in universal salvation

univocal                      having one meaning only; unambiguous; unmistakeable; unequivocal

univocalic                    having only one vowel; written passage using only one vowel

univoltine                    having one brood a year

univorous                     living on only one host or source of food

unleal                        unfaithful

unphilosophise                to degrade from the character of a philosopher

unpregnant                    not prolific; slow of wit, inept

unreeve                       to withdraw a rope from an opening

unseel                        to unsew the eyes of

unseven                       to render other than seven; to reduce from seven in number

unsinew                       to take the strength from

unsonsy                       boding or causing misfortune; unlucky; unpleasant, disagreeable

unstercorated                 not manured

unsuasible                    not susceptible to persuasion, not suasible; unpersuadable

unthirlable                   impenetrable

untimeous                     untimely

untreasure                    to despoil

untrowable                    incredible

unwelewable                   to be unfadeable

unwithdrawing                 liberal; lavish

upaithric                     roofless; open to the sky

upas                          1. a tall tropical Asian tree of the mulberry family with a latex that contains a substance used as an arrow poison

upas                          2. a poisonous or harmful influence or institution

upas                          poisonous or harmful institution or influence

upbigged                      to be built up

upbuilding                    development; edification

upcast                        upward throw; material thrown up

upher                         rough pole made of fir and used in scaffolding

uplift                        to engineer a species (usually genetically) to make them intelligent

uprist                        rising; uprising

upspeak                       to begin to speak

upstay                        to sustain

uranic                        of the palate

uraniferous                   bearing uranium

uraniscus                     roof of the mouth

uranism                       male homosexuality

uranography                   descriptive astronomy and mapping

uranological                  regarding or pertaining to uranology/astronomy

uranologist                   one who studies or writes on uranology

uranology                     study of the heavens; astronomy

uranology                     the study of the heavens; astronomy; a discourse or treatise on the heavens

uranomancy                    fortunetelling by consulting the heavens

uranomania                    the insane delusion that one is of Heavenly descent

uranometry                    measurement of distances between heavenly bodies

uranophobia                   the fear of heaven

uranoplasty                   plastic surgery on the hard palate

uranoscopy                    star-watching

uraster                       starfish

urbacity                      excessive pride in one's city

urbanist                      expert in urban planning

urbanology                    study of cities

urbarial                      founded on a register of landed property

urbicide                      destruction of a city

urbicolous                    living in the city

urbiculture                   cultivation or development of urban life

urceiform                     shaped like a pitcher

urceolate                     shaped like a pitcher

urceus                        single-handled jug or pitcher

urdé                          pointed; having points

urdee                         of a heraldic device, pointed or broken into parallel pointed projections

ure                           use; custom

uredinology                   the study of rust

uredo                         burning feeling in the skin

urenology                     study of rust molds

urent                         burning; stinging

uresis                        urination

urethroscope                  instrument for viewing the interior of the urethra

uretic                        of, like or pertaining to urine

urgrund                       a primal cause or ultimate cosmic principle

urimancy                      fortunetelling by observing urine

urinator                      diver

urinator                      one who dives under water in search of something, as for pearls; a diver

uriniferous                   bearing urine

urinometer                    instrument for measuring specific gravity of urine

urkingdom                     taxonomic group of organisms larger than a kingdom

urman                         swampy pine forest

urogenous                     producing or produced in urine

urolith                       small stone in the urinary tract

urology                       study of urine; urinary tract

urophobia                     the fear of urinating

uropoietic                    secreting or excreting urine

uropygial                     characteristic of or relating to a bird's rump

uropygium                     rump of a bird

uropygium                     the fleshy and bony prominence at the posterior extremity of a bird's body that supports the tail feathers; the rump

urosthenic                    having a tail designed for propulsion

ursal                         fur seal

ursicide                      killing or killer of a bear

ursiform                      having the shape or appearance of a bear

ursine                        of, like or pertaining to bears

ursprache                     a parent language; proto-language

urtext                        earliest version of a text; original unmodified version

urticaceous                   of, like or pertaining to nettles

urticant                      stinging; irritating

urticariaphobia               the fear of itching

urticate                      1. to beat with a whip

urticate                      2. to sting with nettles

urticate                      to produce wheals or itching

urticate                      to sting; to flog with nettles

usageaster                    self-appointed and conservative language usage expert

usance                        habit; custom

ush                           to serve as an usher

ushabti                       figurine of deceased person placed in Egyptian tomb

usitative                     signifying a usual act

usquebaugh                    water of life, whiskey (Irish)

ustion                        action of burning or searing

ustulate                      scorched or discolored from prolonged exposure to heat

ustulation                    burning; roasting

usucaption                    acquisition of property by long usage and enjoyment

usufruct                      the legal right of using and enjoying the fruits or profits of something belonging to another

usufruct                      the right to use another's property, with the condition that the property be unchanged

usufructuary                  a person who has use or enjoyment of something, especially property

usward                        toward us

uterine                       1. of or relating to the uterus

uterine                       2. having the same mother but different fathers eg. uterine brothers

uterine                       3. being enclosed and dark; womblike

utile                         profitable; useful

utilitarianism                belief that utility of actions determines moral value

utinam                        earnest wish or desire

utlesse                       an escape from prison

utraquist                     person speaking two or both of two languages

utricide                      one who stabs an inflated skin vessel instead of killing someone

utricle                       small cavity or sac

utriculiform                  shaped like a small cavity or sac

utriform                      shaped like a leather bottle or flask

uvala                         irregular depression in a karst terrain

uvate                         grape jam or jelly

uvelloid                      resembling a small cluster of grapes

uvid                          moist; wet

uvula                         the little tongue that hangs down in the back of one's throat

uxorial                       of, like or pertaining to a wife

uxoricide                     the murder of a wife by her husband

uxoricide                     the murder of a wife by her husband; a wife murderer

uxorious                      1. excessively devoted to one's husband

uxorious                      2. excessively fond of one's wife

uxorious                      excessively fond of or submissive to a wife

uxorodespotic                 tyrranical rulership by one's wife

uxorodespotism                ruthless, tyrannical domination by a wife

uzzard                        1. the letter z; izzard

uzzard                        2. a third-generation bastard