sunroof vs roof

sunroof and roof both are nouns.

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

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

sunroof (noun)	roof (noun)
an automobile roof having a sliding or raisable panel	a protective covering that covers or forms the top of a building
	protective covering on top of a motor vehicle
	an upper limit on what is allowed
	the inner top surface of a covered area or hollow space

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