Crash

blocco

(computer malfunction)

crack

(sudden large decline of business)

crollo

(sudden large decline of business)

fracasso

(loud sound)

incidente

(vehicle accident)

scontro

(vehicle accident)

imbucarsi

(slang: to turn up without having been invited)

schiantare

(to severely damage or destroy by causing to collide with something else)

scontrarsi

(to collide, fall or come down violently)