gable roof vs saddleback roof

gable roof and saddleback roof both are nouns.

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

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

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

Other synonyms of gable roof include saddle roof, saddleback.

gable roof (noun)	saddleback 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