bump, collision, concussion, crash, impact, jar, jolt, jounce, kick, shock, slam, smash, strike, wallop

blow, buffet, hit, knock, punch, rap, slap, thumpbashing, battering, bludgeoning, clobbering, hammering, lambasting, licking, pounding, pummeling(also pummelling), thrashingcontact, encounter, meeting, touch