| casualty(upset, ruin, smash, crash, hazard) |
| cataclysm(ruin, catastrophe, tragedy) |
| catastrophe(upset, ruin, shock, surprise, misfortune) |
| clang(noun, smash, crash, clatter, clank) |
| clank(noun, smash, crash, clatter, clang) |
| collapse(noun, trouble, ruin, harm, distress) |
| collide |
| combat(noun, action, meet, attack, fight) |
| competition(fight, battle, war) |
| confrontation(noun, dispute, smash, conflict, crash) |
| counteraction |
| cross-purposes |
| crunch(shock, collapse, smash, crash, wreck) |
| debacle(noun, upset, trouble, ruin, blow) |
| difference(noun, conflict) |
| discordance(noun, dispute, smash, conflict, crash) |
| dissidence(noun, conflict, discordance) |
| dissonance(noun, conflict, discordance) |
| engagement(noun, action, fight, dispute, smash) |
| failure(noun, ruin, catastrophe, tragedy) |