See more synonyms for pileup on Thesaurus.com
  1. a massive collision of several or many moving vehicles.
  2. an accumulation, as of work, chores, or bills.
  3. a rough or disorderly falling of people upon one another, as in a football game.

Origin of pileup

First recorded in 1825–35; noun use of verb phrase pile up
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for pileup

accumulation, collision, accident, crash