pile in WordNet English dictionary

1. a collection of objects laid on top of each other
   pile  heap  mound  agglomerate  cumulation  cumulus 
   
2. a nuclear reactor that uses controlled nuclear fission to generate energy
   atomic pile  atomic reactor  pile  chain reactor 
   
3. (often followed by `of') a large number or amount or extent
   "a batch of letters"; "a deal of trouble"; "a lot of money"; "he made a mint on the stock market"; "see the rest of the winners in our huge passel of photos"; "it must have cost plenty"; "a slew of journalists"; "a wad of money"
   batch  deal  flock  good deal  great deal  hatful  heap  lot  mass  mess  mickle  mint  mountain  muckle  passel  peck  pile  plenty  pot  quite a little  raft  sight  slew  spate  stack  tidy sum  wad 
   
4. a large sum of money (especially as pay or profit)
   "she made a bundle selling real estate"; "they sank megabucks into their new house"
   pile  bundle  big bucks  megabucks  big money 
   
5. fine soft dense hair (as the fine short hair of cattle or deer or the wool of sheep or the undercoat of certain dogs)
   down  pile 
   
6. battery consisting of voltaic cells arranged in series; the earliest electric battery devised by Volta
   voltaic pile  pile  galvanic pile 
   
7. the yarn (as in a rug or velvet or corduroy) that stands up from the weave
   "for uniform color and texture tailors cut velvet with the pile running the same direction"
   pile  nap 
   
8. a column of wood or steel or concrete that is driven into the ground to provide support for a structure
   pile  spile  piling  stilt 
   

1. arrange in stacks
   "heap firewood around the fireplace"; "stack your books up on the shelves"
   stack  pile  heap 
   
2. press tightly together or cram
   "The crowd packed the auditorium"
   throng  mob  pack  pile  jam 
   
3. place or lay as if in a pile
   "The teacher piled work on the students until the parents protested"
   pile