Synonyms of fantastic

1 Syllable

odd, mad, weird, quaint, queer

2 Syllables

wacky, quainter, madder, moony, foreign, floater, king-size, unreal, blue-sky, loopy, quaintest, mondo, ripping, tomfool, campy, groovy, maddest, odder, laughing, crazy, screamer, eerier, rioter, oddest, absurd, turn-on, whaler, groovier, dreamy, reachy, freakish, foolish, strangest, far-out, har-har, campiest, dreamier

3 Syllables

fanciful, extreme, erratic, fictional, hellacious, incongruous, fairy-tale, prodigious, dreamed-up, stupendous, phantasmal, abnormal, chimeric, fictitious, marvelous, bizarre, grotesque, notional, capricious, misleading, invented, gelastic, far-fetched, foolheaded, outlandish, eccentric, peculiar, comical, farfetched, insane, softheaded, chimeral, towering, whimsical, unworldly, phantasmic, exotic, uncommon, tremendous, towery, transcendent, uncanny, daydreamy, singular, romantic, ludicrous, wonderful, laughable, fabulous

4 Syllables

illusory, implausible, illusive, suppositious, delusive, phenomenal, irrational, preposterous, extravagant, incredible, chimerical, visionary, derisory, artificial, unfamiliar, nonsensical, fantastical, spectacular, supernormal, supranormal, fairytale, monumental, imbecilic, ridiculous, disconsonant, razzle-dazzle, barmecidal, ultamodern, unlikely

5 Syllables

phantasmagoric, heteromorphic, insupposable, inconceivable, unbelievable, unprecedented, extraordinaire, extraordinary, exaggerated, imaginary, introvertive

6 Syllables

hallucinatory, phantasmagorical, inapprehensible, imaginative, uninvestigated, unimaginable