Synonyms and related words :
accident, blow, blunder, boner, bull, calamity, casualty, cataclysm, catastrophe, collision, contretemps, crack-up, crash, disaster, error, faux pas, grief, howler, ill hap, lapse, mischance, misfortune, mishap, nasty blow, pileup, shipwreck, shock, slip, smash, smashup, staggering blow, tragedy, wreck