housing vs dwelling

housing and dwelling both are nouns.

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

As nouns, dwelling is a hyponym of housing; that is, dwelling is a word with a more specific, narrower meaning than housing:

housing (noun)	dwelling (noun)
structures collectively in which people are housed	housing that someone is living in
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