WordNet sense 1 (a person who makes deceitful pretenses):

faker, fraud, imposter, impostor, pretender, pseudo, sham, pseud, shammer, role player

WordNet sense 2 (something that is a counterfeit; not what it seems to be):

postiche

WordNet sense 3 (fake or falsify):

cook, falsify, fudge, manipulate, misrepresent, wangle

WordNet sense 4 (make a copy of with the intent to deceive):

forge

WordNet sense 5 (not genuine or real; being an imitation of the genuine article):

imitation, simulated, false, faux

WordNet sense 6 (contrived by art rather than nature):

artificial, unreal

WordNet sense 7 (fraudulent; having a misleading appearance):

bogus, phoney, phony

WordNet sense 8 (not genuine; imitating something superior):

counterfeit, imitative

WordNet sense 9 (talk through one's hat):

bull, bullshit

WordNet sense 10 ((football) a deceptive move made by a football player):

juke