unthinkable

Synonyms

fantastic (also fantastical), implausible, inconceivable, incredible, incredulous, unbelievable, uncompelling, unconceivable, unconvincing, unimaginable;

Antonyms

believable, cogitable, conceivable, convincing, credible, creditable, imaginable, plausible, supposable, thinkable;

Near Antonyms

likely, possible, probable;

reasonable;

certain, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unquestionable;

Related Words

debatable, disputable, doubtable, doubtful, dubious, dubitable, far-fetched, fishy, flimsy, questionable, shaky, suspect, suspicious, unlikely, unreasonable;

hopeless, impossible;

absurd, comical, farcical, laughable, ludicrous, outlandish, preposterous, ridiculous, risible, silly;

indefensible, insupportable, untenable;

Phrases

full of it;