housewife vs married woman

housewife and married woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
housewife	Yes	No	No	No
married woman	Yes	No	No	No

As nouns, married woman is a hypernym of housewife; that is, married woman is a word with a broader meaning than housewife:

housewife: a wife who manages a household while her husband earns the family income
married woman: a married woman; a man's partner in marriage

Other hypernyms of housewife include wife.

housewife (noun)	married woman (noun)
a wife who manages a household while her husband earns the family income	a married woman; a man's partner in marriage