CASKS is a playable word

cask Scrabble® Dictionary

verb
casked, casking, casks
to store in a cask (a strong barrel)
15 Playable Words can be made from "CASKS"
   2-Letter Words (2 found)
   3-Letter Words (6 found)
   4-Letter Words (5 found)
   5-Letter Words (2 found)