lover vs buff

lover and buff both are nouns.

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

As nouns, lover and buff are synonyms defined as:

Other synonyms of lover include devotee, fan.

lover (noun)	buff (noun)
a person who loves someone or is loved by someone	an implement consisting of soft material mounted on a block; used for polishing (as in manicuring)
an ardent follower and admirer	a medium to dark tan color
a significant other to whom you are not related by marriage	bare skin
	an ardent follower and admirer
	a soft thick undyed leather from the skins of e.g. buffalo or oxen

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

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