1) Absolute shambles 2) Collapse 3) Complete collapse 4) Complete disaster 5) Complete failure 6) Disaster 7) Disastrous collapse 8) Disastrous failure 9) Disorganised event 10) Failure 11) Fiasco 12) Fiasco or absolute shambles 13) Flop 14) French word used in English 15) Humiliating failure 16) Humiliation 1) Catastrophe 2) Drubbing 3) Fiasco 4) Rout 5) Snafu 6) Thrashing 7) Trouncing 
A débâcle is an event that turns out as a disaster. It is also the name of: ...
• (n.) A breaking or bursting forth; a violent rush or flood of waters which breaks down opposing barriers, and hurls forward and disperses blocks of stone and other debris. • (n.) A sudden breaking up or breaking loose; a violent dispersion or disruption; impetuous rush; outburst.
De·ba'cle noun [ French débâcle , from débâcler to unbar, break loose; prefix dé- (prob. = Latin dis ) + bâcler to bolt, from Latin baculum a stick.] (Geol.) A breaking or bursting forth; a violent rush or flood of waters which breaks down oppos...
a breakup overthrow sudden disaster 
A debacle is a sudden breaking up of ice in a river. The term is used by geologists for any sudden outbreak of water, hurling before it and dispersing stones and other debris.
[n] - flooding caused by a tumultuous breakup of ice in a river during the spring or summer 2. [n] - a sudden and violent collapse
noun flooding caused by a tumultuous breakup of ice in a river during the spring or summer
a general breakup or dispersion; sudden downfall or rout: The revolution ended in a debacle. · a complete collapse or failure. · a breaking up of ice in a river. Cf. embacle. · a violent rush of waters or ice.
[SAT terms] a sudden and violent collapse a sound defeat[Intelligent words] a sound defeat