FLASKS is a playable word

flask Scrabble® Dictionary

noun
pl. flasks
a narrow-necked container
22 Playable Words can be made from "FLASKS"
   2-Letter Words (5 found)
   3-Letter Words (9 found)
   4-Letter Words (6 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)