Synonyms of stack-up

1 Syllable
smash, blow
2 Syllables
smashup, mishap, splashdown, total, hazard, fluke, blunder, setback, pileup, crack-up, wrack-up
3 Syllables
rear-ender, mistake, disaster, collision, accident
4 Syllables
misfortune, calamity, fender-bender, ill-fortune
5 Syllables
misadventure