Thesaurus
sure
adjective
Synonyms and Antonyms of SURE
1
having or showing a mind free from doubt <are you absolutely sure that she said she was coming today?>
Related Words self-assured, self-conceited, self-confident; decisive, resolute, unfaltering, unhesitating, unquestioning, unwavering
2
impossible to avoid or evade <the joke's a sure dud if you don't pause in the right places>
Related Words decided, definite, settled; likely, possible, probable; destined, fated, foreordained, predestined, predetermined, preordained; inexorable, relentless, unremitting, unstoppable
Near Antonyms preventable (also preventible); doubtful, dubious, questionable, shaky, unclear; undecided, unsettled; undependable, unreliable; improbable, unlikely
3
not likely to fail <a sure cure for the winter blues—a week in the Bahamas>
Antonyms fallible
4
worthy of one's trust <a sister is a sure friend for life>
Synonyms calculable, good, reliable, responsible, safe, secure, solid, steady, sure, tried, tried-and-true, true, trustable, trustworthy, trusty
Related Words constant, devoted, faithful, fast, loyal, staunch (also stanch), steadfast, true-blue; honest, sincere, single-minded; infallible, unerring; bedrock, firm, sound, strong; effective, telling; attested, authenticated, confirmed, proven, valid, validated, verified; blameless, faultless, guiltless, impeccable, inerrant, irreproachable, unimpeachable, unquestionable
Near Antonyms disloyal, faithless, false, fickle, inconstant, perfidious, recreant, traitorous, treacherous, unfaithful, untrue; deceitful, dishonest, lying, mendacious, untruthful; debatable, disputable, doubtable, doubtful, dubious, fishy, problematic (also problematical), questionable, shady, shaky, suspect, uncertain, unsound; hazardous, risky; unconfirmed, untried
5
not capable of being challenged or proved wrong <no sure evidence that life exists on other planets>
Synonyms accomplished, certain, inarguable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, positive, sure, unanswerable, unarguable, unchallengeable, undeniable, unquestionable
Related Words unambiguous, unequivocal; absolute, clear, conclusive, decisive, definite, hands-down; uncontested, uncontradicted, undisputed, unquestioned
Near Antonyms controversial, debated, disputed; doubtful, dubious, iffy, inconclusive, indecisive, uncertain; ambiguous, equivocal; academic (also academical), hypothetical, speculative, theoretical (also theoretic)
Antonyms answerable, arguable, contradictable, controvertible, debatable, disputable, doubtable, moot, negotiable, problematic (also problematical), questionable, refutable
Seen & Heard
What made you want to look up sure[adjective]? Please tell us where you read or heard it (including the quote, if possible).