Charlatan

(n.) A quack; an impostor; one who prates much in his own favor, and makes unwarrantable pretensions; an empiric; a mountebank.

Thesaurus Entries

blagueur, bluff, bluffer, charlatanic, charlatanish, fake, faker, fourflusher, fraud, horse doctor, humbug, impersonator, impostor, malingerer, medicaster, medicine man, medicine monger, mountebank, phony, poser, poseur, pretender, quack, quackish, quacksalver, quackster, ringer, saltimbanco, sham, shammer