buff vs lover

buff and lover both are nouns.

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

As nouns, buff and lover are synonyms defined as:

Other synonyms of buff include devotee, fan.

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

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

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