- uncritical
- undiscerning
- unschooled
- untutored
- untaught
- uneducated
- unruly mob
- upwards
- uncivil
- utensil cleaner
- unskillful
- useless
- usurious
- usurer
- unborn
- ungodly
- uncharitable
- uppity
- unknowledgeable
- unerasable
- unkind
- unpitying
- uncharted
- unfamiliar with
- unfamiliar
- unfading
- unemployed people
- unintelligent
- unformatted capacity
- unformatted disk
- under the plough
- uterine volsellum
- uveoparotid fever
- uretero_litheotomy
- underhung
- ureteric colic
- unreplaceable
- unionization
- unionisation
- unexpressed
- umbilico_urinary
- ulcerogangrenous
- ulcerglandular tularaemia
- united nations conference on trade and development
- university of west virginia
- ureterocystoscope
- ureterectomy
- urogenital duct
- urethrocytography
- uterine drug