brony vs buff

brony and buff both are nouns.

Word	Noun	Adjective	Verb	Adverb
brony	Yes	No	No	No
buff	Yes	Yes	Yes	No

As nouns, buff is a hypernym of brony; that is, buff is a word with a broader meaning than brony:

Other hypernyms of brony include devotee, fan, lover, adult male, man.

brony (noun)	buff (noun)
an adult, male fan of the show My Little Pony: Friendship is Magic	an implement consisting of soft material mounted on a block; used for polishing (as in manicuring)
	a medium to dark tan color
	bare skin
	an ardent follower and admirer
	a soft thick undyed leather from the skins of e.g. buffalo or oxen

brony (adjective)	buff (adjective)
	of the yellowish-beige color of buff leather

brony (verb)	buff (verb)
	polish and make shiny
	strike, beat repeatedly