gable vs gable wall

gable and gable wall both are nouns.

Word	Noun	Adjective	Verb	Adverb
gable	Yes	No	No	No
gable wall	Yes	No	No	No

As nouns, gable and gable wall are synonyms defined as:

gable and gable wall: the vertical triangular wall between the sloping ends of gable roof

Other synonyms of gable include gable end.

gable (noun)	gable wall (noun)
the vertical triangular wall between the sloping ends of gable roof	the vertical triangular wall between the sloping ends of gable roof