STACKS is a playable word

stack Scrabble® Dictionary

verb
stacked, stacking, stacks
to pile
41 Playable Words can be made from "STACKS"
   2-Letter Words (4 found)
   3-Letter Words (13 found)
   4-Letter Words (15 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)