Similar Words to Stacks:
Dozens
Gobs
Heaps
Lashings
Loads
Lots
Oodles
Piles
Rafts
Scads
Scores
Slews
Tons
Wads
Definitions of Stacks:
1. A large number or amount
2. Storage space in a library consisting of an extensive arrangement of bookshelves where most of the books are stored