The crossword solution for the term REAR-___ (CAR CRASH) is ENDER, a five-letter word. The term 'REAR-ender' is used to describe a type of CAR CRASH in which one vehicle collides with the back of another vehicle. This type of CRASH usually occurs when the REAR vehicle is stopped or moving slowly and the front vehicle is travelling at a higher speed. REAR-enders are often caused by distracted driving, such as texting while driving, or by drivers who are not paying attention to the road.