- untouchability
- unsavouriness
- unprescriptible right
- unsigned
- unvoluntary
- unusually fat
- unportable
- unlive
- up in the air
- unemphatic
- underrun
- undescended testicle
- undescended testis
- unpeopled
- unthinkingly
- under oath
- unitarianism
- uninterrupted sequence (of words in a sentence)
- under the shadow of death
- unrecognisably
- unrecognizably
- unrecognizable
- unimpressionable
- under a vow not to speak
- underlining
- unheard (of)
- unheard
- unthrone
- unthrifty
- unionidae
- union with a woman
- under one's complete control
- unlivable
- uniterm
- unlined
- unvoiced
- unvocalized outline
- unverbalized
- unverbalised
- unvoiced (sound)
- unuttered
- undatus
- unflustered
- unrouged
- unruffled
- uneventfully
- unperused
- unpeaceful
- unexposed
- unluckiness