enforcer vs hatchet man

enforcer and hatchet man both are nouns.

Word	Noun	Adjective	Verb	Adverb
enforcer	Yes	No	No	No
hatchet man	Yes	No	No	No

As nouns, enforcer and hatchet man are synonyms defined as:

enforcer and hatchet man: one whose job it is to execute unpleasant tasks for a superior

enforcer (noun)	hatchet man (noun)
one whose job it is to execute unpleasant tasks for a superior	one whose job it is to execute unpleasant tasks for a superior
	a professional killer