Accumulation

noun

1. The act of gathering or amassing, as into a heap or pile.
2. The process of growing into a large amount or heap.

   "the steady accumulation of knowledge."

3. An amount that has accumulated or been accumulated.

   "an accumulation of debt."

4. The act of accumulating, or state of being accumulated; an amassing; a collecting together.
5. Growth by continuous additions, as the addition of interest to principal.