Synonyms and related words :
appulse, bulldozing, bulling, bump, burden, cannon, carambole, carom, clash, collision, concussion, crack-up, crash, crump, crunch, encounter, full force, hammering, impact, impingement, mauling, meeting, onslaught, onus, percussion, ramming, shock, sideswipe, sledgehammering, smash, smash-up, smashing, stress, thrusting, violence, weight, whomp