adaptability, backfire, backlash, backlashing, be reflected, be sent back, boom, boomerang, booming, bounce, bounce back, bounciness, bound, bound back, buoyance, buoyancy, cannon, cannon off, carom, comeback, contrecoup, echo, echo back, elasticity, extensibility, flexibility, fly back, give, growl, growling, grumble, grumbling, have repercussions, kick, kick back, kickback, lash back, liveliness, reboation, rebuff, recalcitrate, recalcitration, recoil, reecho, reflex, repercuss, repercussion, repulse, resile, resilience, resiliency, resound, resounding, responsiveness, return, reverberate, reverberation, ricochet, roll, rumble, rumbling, send back, snap, snap back, sound, spring, spring back, springiness, stretch, stretchability, stretchiness, thunder, thundering, tone, tonicity, tonus