buff vs raw sienna

buff and raw sienna both are nouns.

Word	Noun	Adjective	Verb	Adverb
buff	Yes	Yes	Yes	No
raw sienna	Yes	No	No	No

As nouns, buff and raw sienna are synonyms defined as:

Other synonyms of buff include caramel, caramel brown, yellowish brown.

buff (noun)	raw sienna (noun)
an implement consisting of soft material mounted on a block; used for polishing (as in manicuring)	a medium to dark tan color
a medium to dark tan color	a yellowish-brown pigment made from untreated sienna
bare skin
an ardent follower and admirer
a soft thick undyed leather from the skins of e.g. buffalo or oxen

buff (adjective)	raw sienna (adjective)
of the yellowish-beige color of buff leather

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