Stacks of Stuff can be referred to as PILES, which is a 5 letter word. PILES are an accumulation of objects that are placed on top of each other in a neat or disorderly fashion. They can be made up of anything from books to clothes and can be found in many places, such as homes, offices, and warehouses. Stacks of Stuff can also refer to the act of organizing items into PILES, which can be done for convenience or to save space.