live together vs cohabit

live together and cohabit both are verbs.

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

As verbs, live together and cohabit are synonyms defined as:

live together and cohabit: share living quarters; usually said of people who are not married and live together as a couple

Other synonyms of live together include shack up.

live together (verb)	cohabit (verb)
share living quarters; usually said of people who are not married and live together as a couple	share living quarters; usually said of people who are not married and live together as a couple
	exist together