THESAURUS
keel over
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