malignment vs calumniation

malignment and calumniation both are nouns.

Word	Noun	Adjective	Verb	Adverb
malignment	Yes	No	No	No
calumniation	Yes	No	No	No

As nouns, calumniation is a hypernym of malignment; that is, calumniation is a word with a broader meaning than malignment:

malignment: slanderous defamation
calumniation: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other hypernyms of malignment include calumny, defamation, hatchet job, obloquy, traducement.

malignment (noun)	calumniation (noun)
slanderous defamation	a false accusation of an offense or a malicious misrepresentation of someone's words or actions