Same word as quacksalver:

actor, bum, bunco artist, charlatan, cheat, con artist, counterfeit, counterfeiter, fake, faker, flimflammer, four-flusher, fraud, hoser, humbug, impostor, mountebank, phony, playactor, pretender, pseudo, put-on, quacksalver, sham, shammer, shark, sharp, simulator, slicker, whip