WordNet sense 1 (a sudden large decline of business or the prices of stocks (especially one that causes additional failures)):

collapse

WordNet sense 2 (a loud resonant repeating noise):

clang, clangor, clank, clash, clangoring, clangour

WordNet sense 3 (a serious accident (usually involving one or more vehicles)):

wreck

WordNet sense 4 (enter uninvited; informal):

gate-crash, barge in

WordNet sense 5 (break violently or noisily; smash):

break up, break apart

WordNet sense 6 (undergo damage or destruction on impact):

ram

WordNet sense 7 (hurl or thrust violently):

dash

WordNet sense 8 (stop operating):

go down

WordNet sense 9 (the act of colliding with something):

smash

WordNet sense 10 (sleep in a convenient place):

doss, doss down