calumny vs defamation

calumny and defamation both are nouns.

Word	Noun	Adjective	Verb	Adverb
calumny	Yes	No	No	No
defamation	Yes	No	No	No

As nouns, calumny and defamation are synonyms defined as:

calumny and defamation: an abusive attack on a person's character or good name

Other synonyms of calumny include aspersion, denigration, slander.

As nouns, calumny and defamation are synonyms defined as:

calumny and defamation: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other synonyms of calumny include calumniation, hatchet job, obloquy, traducement.

calumny (noun)	defamation (noun)
an abusive attack on a person's character or good name	an abusive attack on a person's character or good name
a false accusation of an offense or a malicious misrepresentation of someone's words or actions	a false accusation of an offense or a malicious misrepresentation of someone's words or actions