Words that start with U

Browse 63 words that start with "U" and obtain a full synonym list for those words. You can use our U-words collection anywhere, as it is completely free to use.

There are 1 2-letter word, 2 3-letter words, 2 4-letter words, 5 5-letter words, 10 6-letter words, and 10 7-letter words that start with "U."

For longer words, there are 7 8-letter words, 1 9-letter word, 8 10-letter words, 8 11-letter words, 3 12-letter words, 5 13-letter words, and 1 14-letter word that start with "U."

2 Letter Words that start with U

Us
- Synonyms: We (subject form), Our group, The two of us
- Opposites: Them, You
- Part of speech: Pronoun

3 Letter Words that start with U

Use
- Synonyms: utilize, make use of, avail oneself of
- Opposites: Abandon, Disregard
- Part of speech: Verb
Ugh
- Synonyms: yuck, phooey, yuk
- Opposites: Amazing, Wow
- Part of speech: Interjection

4 Letter Words that start with U

Upon
- Synonyms: On, Atop, Over
- Opposites: Beneath, Under
- Part of speech: Preposition
Ugly
- Synonyms: unattractive, ill-favoured, hideous
- Opposites: Beautiful, Attractive
- Part of speech: Adjective

5 Letter Words that start with U

Urban
- Synonyms: built-up, town, city
- Opposites: Rural, Suburban
- Part of speech: Adjective
Unite
- Synonyms: unite, bring together, join (together)
- Opposites: Divide, Separate, Split
- Part of speech: Verb
Until
- Synonyms: till, up to, up till
- Opposites: Beyond, After
- Part of speech: Preposition
Under
- Synonyms: less than, lower than, smaller than
- Opposites: More Than, Over
- Part of speech: Preposition
Unity
- Synonyms: union, unification, integration
- Opposites: Division, Disunity
- Part of speech: Noun

6 Letter Words that start with U

Utmost
- Synonyms: greatest, maximum, greatest possible
- Opposites: Least Possible, Very Little, Least
- Part of speech: Adjective
United
- Synonyms: unified, integrated, consolidated
- Opposites: Divided, Separated, Different, Disagreeing, Differing
- Part of speech: Adjective
Uneasy
- Synonyms: worried, anxious, ill at ease
- Opposites: Calm, At Ease
- Part of speech: Adjective
Unlike
- Synonyms: different from, unalike, dissimilar to
- Opposites: Like, Similar To, Similarly To
- Part of speech: Preposition
Unable
- Synonyms: not able, powerless, impotent
- Opposites: Able, Capable
- Part of speech: Adjective
Unsure
- Synonyms: unconfident, not confident, lacking confidence
- Opposites: Confident, Assertive, Decided, Happy, Convinced
- Part of speech: Adjective
Unique
- Synonyms: distinctive, individual, special
- Opposites: Common, Ordinary
- Part of speech: Adjective
Urgent
- Synonyms: acute, grave, pressing
- Opposites: Nonurgent, Leisurely
- Part of speech: Adjective
Unfair
- Synonyms: unjust, inequitable, prejudiced
- Opposites: Fair, Just, Justified
- Part of speech: Adjective
Unless
- Synonyms: Ante, Before, But
- Opposites: If, Whenever
- Part of speech: Conjunction

7 Letter Words that start with U

Uniform
- Synonyms: constant, consistent, steady
- Opposites: Changeable, Variable, Varied, Different
- Part of speech: Adjective
Used To
- Synonyms: Accustomed to, Familiar with, In the habit of
- Opposites: Unaccustomed To, Not Familiar With
- Part of speech: Verb
Unaware
- Synonyms: ignorant, unknowing, unconscious
- Opposites: Aware, Conscious
- Part of speech: Adjective
Unhappy
- Synonyms: sad, miserable, sorrowful
- Opposites: Happy, Cheerful
- Part of speech: Adjective
Utilize
- Synonyms: make use of, put to use, use
- Opposites: Waste, Neglect
- Part of speech: Verb
Unclear
- Synonyms: Ambiguous, Vague, Indistinct
- Opposites: Clear, Lucid
- Part of speech: Adjective
Unusual
- Synonyms: uncommon, abnormal, atypical
- Opposites: Common, Everyday
- Part of speech: Adjective
Usually
- Synonyms: normally, generally, habitually
- Opposites: Rarely, Seldom
- Part of speech: Adverb
Unknown
- Synonyms: undisclosed, unrevealed, undivulged
- Opposites: Known, Decided, Familiar, Famous, Celebrated
- Part of speech: Adjective
Useless
- Synonyms: futile, pointless, purposeless
- Opposites: Useful, Beneficial
- Part of speech: Adjective

8 Letter Words that start with U

Unbiased
- Synonyms: impartial, unprejudiced, non-partisan
- Opposites: Biased, Partisan, Prejudiced
- Part of speech: Adjective
Unlikely
- Synonyms: improbable, not likely, doubtful
- Opposites: Likely, Certain, Believable
- Part of speech: Adjective
Unwanted
- Synonyms: unwelcome, undesirable, undesired
- Opposites: Wanted, Welcome, Desirable, Invited, Loved
- Part of speech: Adjective
Unstable
- Synonyms: unsteady, rocky, wobbly
- Opposites: Stable, Steady
- Part of speech: Adjective
Unawares
- Synonyms: by surprise, unexpectedly, without warning
- Opposites: Prepared, Knowingly, Deliberately
- Part of speech: Adverb
Utilized
- Synonyms: Used, Employed, Exploited
- Opposites: Unused, Neglected
- Part of speech: Adjective
Ultimate
- Synonyms: eventual, last, final
- Opposites: Initial, Preliminary
- Part of speech: Adjective

9 Letter Words that start with U

Unhealthy
- Synonyms: harmful, detrimental, destructive
- Opposites: Healthy, Fit
- Part of speech: Adjective

10 Letter Words that start with U

Undeniable
- Synonyms: indisputable, indubitable, unquestionable
- Opposites: Debatable, Questionable
- Part of speech: Adjective
Unfamiliar
- Synonyms: unknown, new, strange
- Opposites: Familiar, Known
- Part of speech: Adjective
Understand
- Synonyms: appreciate, recognize, realize
- Opposites: Ignore, Misunderstand, Confuse
- Part of speech: Verb
Unpleasant
- Synonyms: disagreeable, irksome, troublesome
- Opposites: Pleasant, Agreeable, Palatable
- Part of speech: Adjective
Underlying
- Synonyms: fundamental, basic, basal
- Opposites: Subordinate, Overt
- Part of speech: Adjective
Up To Date
- Synonyms: modern, contemporary, the latest
- Opposites: Out Of Date, Old-fashioned
- Part of speech: Adjective
Unexpected
- Synonyms: unforeseen, unanticipated, unpredicted
- Opposites: Expected, Predictable
- Part of speech: Adjective
Ultimately
- Synonyms: eventually, in the end, in the long run
- Opposites: Immediately, Initially
- Part of speech: Adverb

11 Letter Words that start with U

Unavoidable
- Synonyms: inescapable, inevitable, bound/sure to happen
- Opposites: Avoidable, Preventable
- Part of speech: Adjective
Unstoppable
- Synonyms: Relentless, Invincible, Unyielding
- Opposites: Stopable, Halted
- Part of speech: Adjective
Unrealistic
- Synonyms: impractical, impracticable, unworkable
- Opposites: Realistic, Pragmatic, Lifelike
- Part of speech: Adjective
Undoubtedly
- Synonyms: doubtless, indubitably, doubtlessly
- Opposites: Possibly, Doubtfully, Questionably
- Part of speech: Adverb
Unimportant
- Synonyms: insignificant, inconsequential, trivial
- Opposites: Important, Significant
- Part of speech: Adjective
Unfortunate
- Synonyms: unlucky, hapless, out of luck
- Opposites: Fortunate, Lucky
- Part of speech: Adjective
Uncertainty
- Synonyms: unpredictability, unreliability, riskiness
- Opposites: Certainty, Predictability, Confidence
- Part of speech: Noun
Unnecessary
- Synonyms: Abundant, Ample, Copious
- Opposites: Essential, Necessary
- Part of speech: Adjective

12 Letter Words that start with U

Unreasonable
- Synonyms: uncooperative, obstructive, unhelpful
- Opposites: Reasonable, Rational
- Part of speech: Adjective
Unacceptable
- Synonyms: intolerable, insufferable, unsatisfactory
- Opposites: Acceptable, Satisfactory
- Part of speech: Adjective
Unbelievable
- Synonyms: incredible, beyond belief, difficult to believe
- Opposites: Believable, Credible
- Part of speech: Adjective

13 Letter Words that start with U

Unforgettable
- Synonyms: memorable, indelible, not/never to be forgotten
- Opposites: Forgettable, Unexceptional
- Part of speech: Adjective
Unpredictable
- Synonyms: Erratic, Uncertain, Variable
- Opposites: Predictable, Certain
- Part of speech: Adjective
Unprecedented
- Synonyms: unparalleled, unequalled, unmatched
- Opposites: Normal, Common
- Part of speech: Adjective
Uncomfortable
- Synonyms: painful, not comfortable, intolerable
- Opposites: Relaxed, Comfortable, Pleasant
- Part of speech: Adjective
Unfortunately
- Synonyms: Regrettably, Sadly, Unhappily
- Opposites: Fortunately, Luckily
- Part of speech: Adverb

14 Letter Words that start with U

Understandable
- Synonyms: comprehensible, easy to understand, intelligible
- Opposites: Incomprehensible, Unfathomable
- Part of speech: Adjective

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