nuclear family vs menage

nuclear family and menage both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuclear family	Yes	No	No	No
menage	Yes	No	No	No

As nouns, menage is a hypernym of nuclear family; that is, menage is a word with a broader meaning than nuclear family:

nuclear family: a family consisting of parents and their children and grandparents of a marital partner
menage: a social unit living together

Other hypernyms of nuclear family include family, home, house, household.

nuclear family (noun)	menage (noun)
a family consisting of parents and their children and grandparents of a marital partner	a social unit living together