brass family vs category

brass family and category both are nouns.

Word	Noun	Adjective	Verb	Adverb
brass family	Yes	No	No	No
category	Yes	No	No	No

As nouns, category is a hypernym of brass family; that is, category is a word with a broader meaning than brass family:

Other hypernyms of brass family include class, family.

brass family (noun)	category (noun)
(music) the family of brass instruments	a general concept that marks divisions or coordinations in a conceptual scheme
	a collection of things sharing a common attribute