unauthentic

being such in appearance only and made or manufactured with the intention of committing fraud trying to sell unauthentic autographs of American presidents Synonyms bogus, fake, false, forged, inauthentic, phony (also phoney), queer, sham, snide, spurious, counterfeitRelated Words artificial, factitious, imitation, man-made, mimic, mock, simulated, substitute, synthetic; dummy, nonfunctioning, ornamental; cultured, fabricated, manufactured; deceptive, delusive, misleadingNear Antonyms natural; actual, true, validAntonyms authentic, bona fide, genuine, real, unfaked