in the buff vs in the raw

in the buff and in the raw both are adjectives.

Word	Noun	Adjective	Verb	Adverb
in the buff	No	Yes	No	No
in the raw	No	Yes	No	No

As adjectives, in the buff and in the raw are synonyms defined as:

Other synonyms of in the buff include bare-ass, bare-assed, in the altogether, naked as a jaybird, peeled, raw, stark naked.

in the buff (adjective)	in the raw (adjective)
(used informally) completely unclothed	(used informally) completely unclothed