faux, bogus, pseud, pretender, sham, simulated, pseudo, counterfeit, imposter, imitation, more...

genuine, real, authentic

imitation, counterfeit, forgery, duplicate, more...

own, good, big, complete, able, little, old, obvious, clever, real, pure

not genuine,   not authentic,   athletic feint,   not the real mccoy,   feign illness,   pretending to care,   not genuinely,   non genuine,   not real or genuine,   a sham