Defamer

de·fame  (d-fm)

tr.v. de·famed, de·fam·ing, de·fames

1. To damage the reputation, character, or good name of by slander or libel. See Synonyms at malign.

2. Archaic To disgrace.

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[Middle English defamen, from Old French defamer, from Medieval Latin dfmre, alteration of Latin diffmre, to spread news of, slander : dis-, abroad, apart; see dis- + fma, rumor, reputation; see bh-² in Indo-European roots.]

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de·famer n.

Thesaurus

Noun

1.

defamer - one who attacks the reputation of another by slander or libel backbiter, libeler, maligner, slanderer, traducer, vilifier depreciator, detractor, disparager, knocker - one who disparages or belittles the worth of something