in the buff vs peeled

in the buff and peeled both are adjectives.

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

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

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

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