Pileup and Sideswipe

Pileup noun - A mass or quantity that has piled up or that has been gathered over a period of time.

Sideswipe and pileup are semantically related In some cases you can use "Sideswipe" instead a noun "Pileup".

Sideswipe noun - A glancing blow from or on the side of something (especially motor vehicles).

Pileup and sideswipe are semantically related in collision topic. Sometimes you can use "Pileup" instead a noun "Sideswipe", if it concerns topics such as accident.