WordNet (r) 3.0 (2006):

body language
    n 1: communication via the movements or attitudes of the body

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "body language":
   bearing, beck, beckon, carriage, charade, chironomy, dactylology,
   deaf-and-dumb alphabet, dumb show, gesticulation, gesture,
   gesture language, hand signal, kinesics, motion, movement,
   pantomime, poise, pose, posture, shrug, sign language, stance