housing vs protective cover

housing and protective cover both are nouns.

Word	Noun	Adjective	Verb	Adverb
housing	Yes	No	No	No
protective cover	Yes	No	No	No

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

housing: a protective cover designed to contain or support a mechanical component
protective cover: a covering that is intend to protect from damage or injury

Other hypernyms of housing include protection, protective covering.

housing (noun)	protective cover (noun)
structures collectively in which people are housed	a covering that is intend to protect from damage or injury
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