dome vs roof

dome and roof both are nouns.

Word	Noun	Adjective	Verb	Adverb
dome	Yes	No	No	No
roof	Yes	No	Yes	No

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

dome (noun)	roof (noun)
a hemispherical roof	a protective covering that covers or forms the top of a building
a stadium that has a roof	protective covering on top of a motor vehicle
informal terms for a human head	an upper limit on what is allowed
a concave shape whose distinguishing characteristic is that the concavity faces downward	the inner top surface of a covered area or hollow space

dome (verb)	roof (verb)
	provide a building with a roof; cover a building with a roof