91 synonyms for incredible such as astonishing, absurd, amazeballs, and amazing. Incredible is an adjective, and its antonyms are believable, likely, and unspectacular.
Absurd, astonishing, astounding, beyond belief, breathtaking, cock and bull, doubtful, dubious, extraordinary, fanciful, fantastic, far-fetched, feeble, fictitious, half-baked, hard to believe, hard to swallow/take, highly unlikely, implausible, impossible, improbable, inadequate, inconceivable, ineffectual, laboured, mythical, not in the least likely, paltry, pathetic, phenomenal, poor, preposterous, questionable, scarcely credible, shallow, staggering, strained, tall, tame, thin, transparent, trifling, unbelievable, unconvincing, unheard of, unimaginable, unimagined, unrealistic, unsatisfactory, unsound, unthinkable, and weak.
Amazeballs, amazing, astonishing, astounding, awe-inspiring, awesome, awful, breathtaking, dazzling, extraordinary, fantastic, formidable, great, imposing, impressive, magnificent, marvellous, mind-blowing, mind-boggling, miraculous, out of this world, phenomenal, prodigious, remarkable, spectacular, staggering, stunning, stupendous, sublime, superhuman, supreme, terrific, tremendous, unbelievable, unco, unreal, wonderful, and wondrous.