Synonyms of unnatural

1 Syllable
stiff, cruel, odd, faux, weird, queer, rum
2 Syllables
made-up, crueler, kooky, airish, queerer, studied, queerest, strange, freaky, false, rummy, forced, pseudo, man-made, phony, strained, posed, rumer, staged, clinker, feigned, ghastlier, wrecker, freakier, ghastly, ersatz, too-too, off-key, off-pitch, off-tone, cruelest, weirder, weirdest, freakish, stilted, morbid, rummier, kookier, put-on, artsy, jivey, mincing
3 Syllables
erratic, outrageous, mystifying, divergent, abnormal, synthetic, contrived, unusual, labored, bizarre, grotesque, manmade, constrained, mysterious, far-fetched, factitious, outlandish, eccentric, farfetched, concocted, depraved, theatrical, assumed, affected, mannered, aberrant, pharisaic, untuned, perverted, uncanny, contrary, pecksniffian, perverse
4 Syllables
make-believe, unconforming, preposterous, incredible, alchemistic, irregular, artificial, unorthodox, deviative, fabricated, insincere, ungrateful, supernormal, supranormal, imitation, atypical, anomalous, unrelaxed, pharisaical, unspontaneous
5 Syllables
unaccountable, anomalistic, heteromorphic, preternatural, heteroclite, astrological, enigmatical, hypocritical, extraordinary, supernatural, supersensible
7 Syllables
unrepresentative