backbiter vs vilifier

backbiter and vilifier both are nouns.

Word	Noun	Adjective	Verb	Adverb
backbiter	Yes	No	No	No
vilifier	Yes	No	No	No

As nouns, backbiter and vilifier are synonyms defined as:

backbiter and vilifier: one who attacks the reputation of another by slander or libel

Other synonyms of backbiter include defamer, libeler, maligner, slanderer, traducer.

backbiter (noun)	vilifier (noun)
one who attacks the reputation of another by slander or libel	one who attacks the reputation of another by slander or libel