Backlog and Piles

Backlog noun - An accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services).

Piles and backlog are semantically related. In some cases you can use "Piles" instead a noun "Backlog".

Piles noun - A large number or amount.

Backlog and piles are semantically related. Sometimes you can use "Backlog" instead a noun "Piles".