saddleback roof vs saddle roof

saddleback roof and saddle roof both are nouns.

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

As nouns, saddleback roof and saddle roof are synonyms defined as:

saddleback roof and saddle roof: a double sloping roof with a ridge and gables at each end

Other synonyms of saddleback roof include gable roof, saddleback.

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