Backlog and Cumulus

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).

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

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

Backlog and cumulus are semantically related. Sometimes you can use "Backlog" instead a noun "Cumulus".