PENSTOCKS is a playable word

penstock Scrabble® Dictionary

noun
pl. penstocks
a conduit for conveying water to a waterwheel
267 Playable Words can be made from "PENSTOCKS"
   2-Letter Words (15 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)