Synonyms and related words :
action and reaction, answer, automatic reaction, autonomic reaction, backset, backsliding, backward motion, backward step, bounceback, echo, lapse, predictable response, reaction, recession, recidivation, recidivism, reentry, reflection, reflex, reflex action, refluence, reflux, regress, regression, relapse, reply, respondence, response, retrocession, retroflexion, retrogradation, retrogression, retrusion, return, reverberation, revulsion, rise, rollback, setback, sternway, throwback, unthinking response