gable roof vs gambrel

gable roof and gambrel both are nouns.

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

As nouns, gambrel is a hyponym of gable roof; that is, gambrel is a word with a more specific, narrower meaning than gable roof:

gable roof: a double sloping roof with a ridge and gables at each end
gambrel: a gable roof with two slopes on each side and the lower slope being steeper

Other hyponyms of gable roof include gambrel roof.

gable roof (noun)	gambrel (noun)
a double sloping roof with a ridge and gables at each end	a gable roof with two slopes on each side and the lower slope being steeper