gambrel vs gambrel roof

gambrel and gambrel roof both are nouns.

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

As nouns, gambrel and gambrel roof are synonyms defined as:

gambrel and gambrel roof: a gable roof with two slopes on each side and the lower slope being steeper

gambrel (noun)	gambrel roof (noun)
a gable roof with two slopes on each side and the lower slope being steeper	a gable roof with two slopes on each side and the lower slope being steeper