assassination vs calumny

assassination and calumny both are nouns.

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

As nouns, calumny is a hypernym of assassination; that is, calumny is a word with a broader meaning than assassination:

assassination: an attack intended to ruin someone's reputation
calumny: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other hypernyms of assassination include calumniation, defamation, hatchet job, obloquy, traducement.

assassination (noun)	calumny (noun)
murder of a public figure by surprise attack	an abusive attack on a person's character or good name
an attack intended to ruin someone's reputation	a false accusation of an offense or a malicious misrepresentation of someone's words or actions