saddleback roof vs roof

saddleback roof and roof both are nouns.

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

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

saddleback roof (noun)	roof (noun)
a double sloping roof with a ridge and gables at each end	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

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