collapse

noun

1.
an abrupt failure of function or complete physical exhaustion
prostration
Derived from:
collapse
2.
a natural event caused by something suddenly falling down or caving in
Derived from:
collapse
3.
the act of throwing yourself down; collapse; sink
flop
4.
a sudden large decline of business or the prices of stocks (especially one that causes additional failures)
crash
Derived from:
collapse