Thesaurus
improbable
adjective
Synonyms and Antonyms of IMPROBABLE
not likely to be true or to occur <it seems improbable that the two writers never met since they traveled in the same social circles>
Related Words implausible, impossible, inconceivable, incredible, unbelievable, unimaginable, unthinkable; absurd, bizarre, crazy, fantastic (also fantastical), foolish, insane, nonsensical, odd, outlandish, preposterous, ridiculous, unreal, wild; outside, remote, slight
Near Antonyms believable, conceivable, credible, earthly, imaginable, plausible; possible, potential; liable
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