noun a serious accident (usually involving one or more vehicles)
Synonymswreck
noun a sudden large decline of business or the prices of stocks (especially one that causes additional failures)
Synonymscollapse
noun the act of colliding with something
Synonymssmash
verb undergo damage or destruction on impact
Synonymsram
verb break violently or noisily; smash
verb enter uninvited; informal
verb hurl or thrust violently
Synonymsdash
verb stop operating
Synonymsgo down
Source: WordNet 3.1, Princeton University