Open English Wordnet
Nouns
(n)collapse, prostrationan abrupt failure of function or complete physical exhaustion“the commander's prostration demoralized his men” (n)collapsea natural event caused by something suddenly falling down or caving in“the roof is in danger of collapse”,
“the collapse of the old star under its own gravity” (n)flop, collapsethe act of throwing yourself down; collapse; sink“he landed on the bed with a great flop” (n)crash, collapsea sudden large decline of business or the prices of stocks (especially one that causes additional failures) Verbs
(v)collapse, fall in, cave in, give, give way, break, founderbreak down, literally or metaphorically“The wall collapsed”,
“The business collapsed”,
“The dam broke”,
“The roof collapsed”,
“The wall gave in”,
“The roof finally gave under the weight of the ice” (v)collapsefold or close up“fold up your umbrella”,
“collapse the music stand” (v)collapselose significance, effectiveness, or value“The school system is collapsing”,
“The stock market collapsed”