motility vs retraction

Other hyponyms of motility include abduction, adduction, agitation, body English, circumduction, disturbance, fetal movement, foetal movement, dart, flit, gesture, headshake, headshaking, inclination, inclining, eversion, everting, inversion, inversion, upending, jerk, jerking, jolt, saccade, kick, kicking, kneel, kneeling, lurch, pitch, pitching, eye movement, opening, prostration, reach, reaching, stretch, reciprocation, reclining, retroflection, retroflexion, rotary motion, rotation, closing, shutting, sitting, posing, sitting, snap, squat, squatting, sweep, toss, quiver, quivering, vibration, wave, flicker, flutter, waver, standing, span, straddle, stroke, squirm, wiggle, wriggle, eurhythmics, eurhythmy, eurythmics, eurythmy.