gable vs gable end

gable and gable end both are nouns.

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

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

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

Other synonyms of gable include gable wall.

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