shack up vs live together

shack up and live together both are verbs.

Word	Noun	Adjective	Verb	Adverb
shack up	No	No	Yes	No
live together	No	No	Yes	No

As verbs, shack up and live together are synonyms defined as:

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

Other synonyms of shack up include cohabit.

shack up (verb)	live together (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