Synonyms and related words :
be lost, black out, capsize, careen, culbuter, drop, faint, fall senseless, founder, go down, gray out, keel, overset, overthrow, overturn, pass out, pitch, pitchpole, plunge, scuttle, sink, slump, somersault, subvert, succumb, swoon, tip over, topple, topple over, topsy-turvify, topsy-turvy, tumble, turn a somersault, turn over, turn topsy-turvy, turn turtle, turn upside down, upset, upset the boat, upturn