Slanderer

n.

1.

One who slanders; a defamer; a calumniator.

Noun

1.

slanderer - one who attacks the reputation of another by slander or libel Synonyms: backbiter, defamer, libeler, maligner, traducer, vilifier

SLANDERER. A calumniator, who maliciously and without reason imputes a crime or fault to another, of which he is innocent.
     2. For this offence, when the slander is merely verbal, the remedy is an action on the case for damages; when it is reduced to writing or printing, it is a libel. (q.v.)

Thersites, backbiter, belittler, calumniator, caustic critic, cynic, debunker, decrier, defamer, deflater, depreciator, derogator, detractor, disparager, hatchet man, knocker, libeler, muckraker, mudslinger, railer, social critic, traducer