assassination vs hatchet job

assassination and hatchet job both are nouns.

Word	Noun	Adjective	Verb	Adverb
assassination	Yes	No	No	No
hatchet job	Yes	No	No	No

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

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

Other hypernyms of assassination include calumniation, calumny, defamation, obloquy, traducement.

assassination (noun)	hatchet job (noun)
murder of a public figure by surprise attack	a false accusation of an offense or a malicious misrepresentation of someone's words or actions
an attack intended to ruin someone's reputation