pileup[noun]Synonyms: crash, crack-up, prang, smash, smash-up, stramash, wreck
 [TahlilGaran] English Synonym Dictionary ▲
 pile·up or 
pile-up (pīl


p

)
n.►  Informal. A serious collision usually involving several motor vehicles.
►  An accumulation: the pile-up of unsold autos (New York Times). 
 [TahlilGaran] American Dictionary ▲