gable end vs bell gable

gable end and bell gable both are nouns.

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

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

gable end: the vertical triangular wall between the sloping ends of gable roof
bell gable: an extension of a gable that serves as a bell cote

Other hyponyms of gable end include corbie gable, pediment.

gable end (noun)	bell gable (noun)
the vertical triangular wall between the sloping ends of gable roof	an extension of a gable that serves as a bell cote