n. 25B6; adjective counterfeit cassettes : FAKE, faked, bogus, forged, imitation, spurious, substitute, ersatz; informal phoney.
genuine.
25B6; noun the notes were counterfeits : FAKE, forgery, copy, reproduction, imitation; fraud, sham; informal phoney, knock-off.
original.
25B6; verb
his signature was hard to counterfeit : FAKE, forge, copy, reproduce, imitate.
he grew tired of counterfeiting interest : FEIGN, simulate, pretend, fake, sham.