Synonyms for Starkers:

adj.

nude (adjective)
naked as a jaybird, unclothed, au naturel, without a stitch, unclad, stark naked, bare.

n.

show, full-frontal, au naturel, bare, stark naked, without a stitch, a state of undress, put on, unclad, naked as a jaybird, topless. starkers (noun)
unclothed.

Other synonyms:

unclad, au naturel. bare. Other relevant words:
au naturel, bare, without a stitch, unclad.