WINDOWS is a playable word

window Scrabble® Dictionary

verb
windowed, windowing, windows
to provide with a window (an opening in a wall to admit light and air)
64 Playable Words can be made from "WINDOWS"
   2-Letter Words (13 found)
   3-Letter Words (23 found)
   4-Letter Words (17 found)
   5-Letter Words (6 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)