Synonyms of collisions

1 Syllable
knock, jolt, shock, ruin, slam, hit, bump, butt, crash, smash, jar, wreck, thud, blow, thump, rap
2 Syllables
strike, head-on, contact, impact, pileup
3 Syllables
encounter, destruction, percussion, concussion
4 Syllables
demolishment, sideswipe
5 Syllables
dilapidation