roof vs protective covering

roof and protective covering both are nouns.

Word	Noun	Adjective	Verb	Adverb
roof	Yes	No	Yes	No
protective covering	Yes	No	No	No

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

roof: a protective covering that covers or forms the top of a building
protective covering: a covering that is intend to protect from damage or injury

Other hypernyms of roof include protection, protective cover.

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

roof: protective covering on top of a motor vehicle
protective covering: a covering that is intend to protect from damage or injury

Other hypernyms of roof include protection, protective cover.

roof (noun)	protective covering (noun)
a protective covering that covers or forms the top of a building	the tough natural covering of some organisms
protective covering on top of a motor vehicle	a covering that is intend to protect from damage or injury
an upper limit on what is allowed
the inner top surface of a covered area or hollow space

roof (verb)	protective covering (verb)
provide a building with a roof; cover a building with a roof