fake

[1]	falsify , doctor , alter , modify , counterfeit , fabricate , manufacture , forge
[2]	pretend , make a pretence of , dissemble , feign , sham , make believe , simulate , affect
[3]	forge , counterfeit
[4]	fudge , manipulate , falsify , cook , wangle , misrepresent
[5]	talk through one's hat , bullshit , bull

[1]	sham , postiche
[2]	imposter , impostor , pretender , faker , fraud , sham , shammer , pseudo , pseud , role player
[3]	juke , hoax , counterfeit , sham , forgery , imitation , (Colloq) phoney/(US) phony
[4]	faker , impostor , charlatan , fraud , hoaxer , mountebank , cheat , humbug , quack , pretender , (Colloq) phoney/(US) phony

adj.

[1]	false , counterfeit , forged , sham , fraudulent , imitation , pinchbeck , bogus , spurious , factitious , (Colloq) phoney/(US) phony
[2]	bogus , phony , phoney , bastard
[3]	false , faux , imitation , simulated