live together vs inhabit

live together and inhabit both are verbs.

Word	Noun	Adjective	Verb	Adverb
live together	No	No	Yes	No
inhabit	No	No	Yes	No

As verbs, inhabit is a hypernym of live together; that is, inhabit is a word with a broader meaning than live together:

live together: share living quarters; usually said of people who are not married and live together as a couple
inhabit: be an inhabitant of or reside in

Other hypernyms of live together include dwell, live, populate.

live together (verb)	inhabit (verb)
share living quarters; usually said of people who are not married and live together as a couple	be an inhabitant of or reside in
	be present in
	exist or be situated within