liquidator vs hit man

liquidator and hit man both are nouns.

Word	Noun	Adjective	Verb	Adverb
liquidator	Yes	No	No	No
hit man	Yes	No	No	No

As nouns, hit man is a hyponym of liquidator; that is, hit man is a word with a more specific, narrower meaning than liquidator:

liquidator: a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)
hit man: a professional killer who uses a gun

liquidator (noun)	hit man (noun)
(law) a person (usually appointed by a court of law) who liquidates assets or preserves them for the benefit of affected parties	a professional killer who uses a gun
a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)