STILLSON is a playable word

stillson Scrabble® Dictionary

noun
pl. stillsons
a large wrench (a tool for gripping and turning)
105 Playable Words can be made from "STILLSON"
   2-Letter Words (13 found)
   3-Letter Words (25 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)