backset, backsliding, backward motion, backward step, ectropion, eversion, introversion, intussusception, invagination, inversion, lapse, pronation, reaction, recession, recidivation, recidivism, reentry, refluence, reflux, regress, regression, relapse, resupination, retroaction, retrocession, retrogradation, retrogression, retroversion, retrusion, return, reversal, reversing, reversion, revulsion, rollback, setback, sternway, supination, throwback, topsy-turviness, topsy-turvydom, transposal, transposition, turning back, turning backwards, turning inside out, turning inward, turning over