Deceiver (?), n. One who deceives; one who leads into error; a cheat; an impostor.
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The deceived and the deceiver are his. Job xii. 16.

Syn. -- Deceiver, Impostor. A deceiver operates by stealth and in private upon individuals; an impostor practices his arts on the community at large. The one succeeds by artful falsehoods, the other by bold assumption. The faithless friend and the fickle lover are deceivers; the false prophet and the pretended prince are impostors.
[1913 Webster]