Synonyms of implausible in English:

implausible


See US English definition of implausible

See UK English definition of implausible

See Spanish definition of inverosímil

adjective

1‘they despaired of his adherence to implausible theories’

SYNONYMS
unlikely, not likely, improbable, questionable, doubtful, debatable
hard to believe, unconvincing, far-fetched, unrealistic, incredible, unbelievable, unimaginable, inconceivable, fantastic, fanciful, ridiculous, absurd, preposterous
informal hard to swallow, cock and bull, tall
ANTONYMS

plausible, convincing