15 unbelievable synonyms include incredible, beyond belief, difficult to believe, scarcely credible, inconceivable, unthinkable, and implausible. Unbelievable is an adjective, and its antonyms are believable and credible. Here are some additional synonyms for "unbelievable" with example sentences.
15 other ways to say unbelievable.
Her story sounded absolutely unbelievable.
The magician's tricks were unbelievable.