Synonyms of unauthentic

1 Syllable
mock, bent, bum, sham
2 Syllables
pseudo, dummy, pretend, forged, bastard, phony, faked, feigned, unreal, spurious, put-on, ersatz, framed, bogus, specious, false
3 Syllables
deceitful, pretended, pirate, assumed, affected, contrived
4 Syllables
imitation, make-believe, apocryphal, deceptive, substitute, ungenuine, simulated, artificial
6 Syllables
illegitimate