| Term | Definition |
| ubiquitous | present everywhere |
| ulterior | hidden |
| umbrage | offense |
| unallayed | going strong |
| unaltered | unchanged |
| unanimity | accord |
| unanimous | concurrent |
| unassuming | humble |
| unbraid | undo |
| uncanny | weird |
| unctuous | sycophantic |
| undermine | threaten |
| underscore | emphasize |
| unequivocal | clear |
| unfetter | to free |
| unheralded | unexpected |
| uniform | same |
| unilateral | one-sided |
| universal | world-wide |
| unprecedented | unparalleled |
| unsightly | ugly |
| unstinting | generous |
| untenable | unable to be defended successfully against criticism or attack |
| unwitting | without knowing or planning |
| unyielding | completely unwilling to change a decision |
| upbraid | scold |
| upheaval | clamor |
| urbane | stylish |
| urgent | needing attention very soon |
| usurp | grab |
| utility | convenience |
| utopian | visionary |
| vacillate | hesitate |
| vacuous | empty |
| vagabond | vagrant |
| vagrant | vagabond |
| vain | worthless |
| validity | authority |
| valor | bravery |
| vapid | dull |
| variegated | varied |
| veer | shift |
| vehement | enthusiastic |
| veiled | hidden |
| venal | corrupt |
| vendetta | feud |
| venerable | renowned |
| venerate | respect |
| vengeful | revengeful |
| venomous | toxic |
| veracity | honesty |
| verbatim | word-for-word |
| verbiage | wordiness |
| verbose | wordy |
| verdant | green |
| verisimilitude | realness |
| vernacular | everyday language |
| verve | energy |
| vestige | trace |
| vex | annoy |
| viable | able to work as intended or able to succeed |
| vibrant | energetic |
| vicarous | substitute |
| vicious | brutal |
| vicissitude | change |
| vigilant | watchful |
| vile | nasty |
| vilify | curse |
| villainous | evil |
| vindicate | justify |
| vindication | justification |
| vindictive | vengeful |
| virtuous | good |
| virulent | venomous |
| visage | face |
| visceral | instinctive |
| viscous | sticky |
| vital | important |
| vitality | liveliness |
| vitiate | ruin |
| vituperate | criticize |
| vituperation | criticism |
| vivacious | lively |
| vociferous | noisy |
| volatile | unsettle |
| voluble | verbose |
| voluminous | huge |
| voluptuous | shapely |
| voracious | gluttonous |
| vouchsafe | to give |
| vulnerable | defenseless |
| waft | draft |
| wager | to bet |
| waiver | contract |
| wariness | distrust |
| warrant | pledge |
| warring | disputant |
| watershed | breaking point |
| waver | hesitate |
| wayward | unpredictable |
| weighty | heavy |
| whim | fancy |
| whimsical | fanciful |
| wily | crafty |
| wince | flinch |
| windfall | jackpot |
| wistful | thoughtful |
| worldliness | sophistication |
| wreak | create |
| xenophobia | racism |
| yearn | long |
| yield | crop |
| zest | enthusiasm |