What is another word for collision?

The term "crash" is a synonym for collision, specifically in the context of transportation incidents involving vehicles. It implies the sudden and forceful impact between two or more objects, such as cars, which is precisely what a collision entails. Both words convey the severity and unexpected nature of such encounters on the road. In common usage, "crash" often refers to vehicle accidents, making it the most accurate synonym in this scenario.

The other options have slightly different meanings. For instance, "incident" is a broader term that encompasses any event, not necessarily one that involves a collision, while "accident" can refer to a mishap that may not involve a sudden impact, and "event" is an even wider term that relates to occurrences in general, lacking the specific connotation of an impact or crash. Thus, "crash" stands out as the most direct synonym for "collision" in this context.