Synonyms of pile-up

1 Syllable
welt, boom, blast, ruin, slam, crash, smash, crack, sock, wham, wreck, bash, blow, bang, burst, clap, whack
2 Syllables
shipwreck, smashup, breakdown, breaking, wallop, smash-up, downfall, breakup, crack-up
3 Syllables
destruction, failure, disaster, debacle, accident, collapse, shattering
4 Syllables
sideswipe