apartment vs housing

apartment and housing both are nouns.

Word	Noun	Adjective	Verb	Adverb
apartment	Yes	No	No	No
housing	Yes	No	No	No

As nouns, housing is a hypernym of apartment; that is, housing is a word with a broader meaning than apartment:

Other hypernyms of apartment include living accommodations, lodging.

apartment (noun)	housing (noun)
a suite of rooms usually on one floor of an apartment house	structures collectively in which people are housed
	a protective cover designed to contain or support a mechanical component
	stable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse