housing vs lamp house

housing and lamp house both are nouns.

Word	Noun	Adjective	Verb	Adverb
housing	Yes	No	No	No
lamp house	Yes	No	No	No

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

housing: a protective cover designed to contain or support a mechanical component
lamp house: housing that holds a lamp (as in a movie projector)

housing (noun)	lamp house (noun)
structures collectively in which people are housed	housing that holds a lamp (as in a movie projector)
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