Synonyms for Au naturel:

adj.

all (adjective)
bare.
naked (adjective)
without a stitch.
starkers (adjective)
naked as a jaybird, stark naked.
without clothing (adjective)
unclad, without a stitch, bare, naked as a jaybird, unclothed.

n.

cold, starkers, al dente, stark naked, Curried, deep-fried, Breaded, without a stitch, naked as a jaybird, put on, battered, cooked, Deviled, show, unclad. topless, a state of undress, full-frontal. au naturel (noun)
unclothed, bare.

Other synonyms:

battered, cooked, unclad, starkers, Breaded, Deviled, full-frontal, Curried, deep-fried, al dente, topless, cold. Other relevant words:
starkers, without a stitch, unclad.