- Urban VIII
- urban wind
- urbiculture
- urbi et orbi
- URC
- urceolate
- urchin
- urd
- Urd
- urdé
- Urdu
- URE
- urea
- urea cycle
- urea-formaldehyde resin
- urease
- uredinium
- urediospore
- uredium
- uredo
- uredosorus
- uredospore
- uredo stage
- ureide
- uremia
- uremic
- urena
- ureter
- ureterolithotomy
- ureterostomy
- ureters
- urethane
- urethr-
- urethra
- urethrectomy
- urethritis
- urethro-
- urethroscope
- urethroscopy
- urethrostomy
- urethrotomy
- uretic
- Urewe
- Urey
- Urfa
- Urfé
- Urga
- urge
- Urgel
- urgency
- urgent
- urgent care
- urgent care center
- urgently
- urger
- Urheimat
- Uri
- Uriah
- Uriah Heep
- urial
- uric
- uric-
- uric acid
- uricacidemia
- uricolysis
- uridine
- uridylic acid
- Uriel
- Urim and Thummim
- urinal
- urinalysis
- urinant
- urinary
- urinary bladder
- urinary calculus
- urinary system
- urinary tract
- urinary tract infection
- urinate
- urine
- urine analysis
- uriniferous
- uriniferous tubule
- urino-
- urinogenital
- urinometer
- urinoscopy
- urinous
- URL
- Urmia
- Urmston
- urn
- Ur-Nammu
- urnfield
- urning
- uro-
- urobilin
- urochord
- urochordate
- urochrome
- urodele
- urodynamics
- Ur of the Chaldees
- urogenital
- urogenital system
- urogenous
- urography
- urokinase
- urolith
- urolithiasis
- urologist
- urology
- uromere
- uronic acid
- uropod
- uropygial
- uropygial gland
- uropygium
- uroscopy
- urostyle
- Urquhart
- Urquhart Castle
- Ursa Major
- Ursa Minor
- ursid
- Ursids
- ursiform
- ursine
- ursine dasyure
- ursine howler
- Ursprache
- Ursula
- Ursuline
- urtext
- Urtext
- urticaceous
- urticant
- urticaria
- urticate
- urtication
- Uru.
- Uruapan
- Urubamba
- Uruguaiana
- Uruguay
- Uruk
- Urumchi
- Urumiyeh
- Ürümqi
- Urundi
- urus
- urushiol
- us
- US
- USA
- usable
- USAF
- USAFI
- usage
- usageaster
- usance
- USAR
- USB
- USB drive
- Usbeg
- Usbek
- USB key
- USB port
- USCG
- USCRC
- US Customary System
- USDA
- USDAW
- use
- use-by date
- use case
- USECC
- used
- used to
- useful
- use immunity
- useless
- Usenet
- use one's head
- user
- user's fee
- user-defined key
- user experience
- user-friendly
- user-generated content
- user group
- user interface
- username
- use tax
- use up
- USHA
- ushabti
- Ushant
- U-shaped
- U-shaped valley
- Ushas
- usher
- Usher
- usherette
- Ushki
- Ushuaia
- USIA
- USIS
- USITC
- Usk
- Üsküb
- Üsküdar
- USM
- Usman dan Fodio
- USMC
- USMS
- USN
- USNA
- Usnach
- usnea
- USNG
- usnic acid
- USNR
- USO
- Usolye
- USP
- Uspallata Pass
- USPHS
- USPO
- USPS
- usquebaugh
- USR
- USRC
- USS
- Ussher
- USSR
- Ussuri
- Ussuriisk
- USTA
- Ustashi
- USTC
- Ústí nad Labem
- Ustinov
- Ust-Kamenogorsk
- USTS
- ustulate
- ustulation
- Ustyurt
- usu.
- usual
- usually
- usucapion
- usufruct
- usufructuary
- Usumacinta
- Usumbura
- usurer
- usurious
- usurp
- usurpation
- usurped
- usurper
- usury
- usw
- USW
- usward
- ut
- UT
- Ut.
- uta
- Utagawa Kuniyoshi
- Utah
- Utahan
- Utamaro
- UTC
- ut dict.
- ute
- Ute
- utend.
- utensil
- uter-
- uteralgia
- uterine
- utero-
- uterus
- Utgard
- Utgard-Loki
- U Thant
- Uther
- Uthman
- UTI
- Utica
- utile
- utile dulci
- Utilicare
- utilidor
- utilitarian
- utilitarianism
- utility
- utility function
