amontonar

v. heap, pile up; hoard up, amass; rick

= heap, stack, pile (up).
Ex: It is true that assignments were being heaped upon him with immense rapidity, but he would be able to sort them out and contrive solutions.
Ex: Cards are filed in drawers, approximately 1000 cards per drawer, which when stacked together may form a catalogue cabinet.
Ex: The first thing I did was pile them one on another and then sit on them while I looked at my other presents.
----
* amontonarse muy alto = be metres high.