ECHELLES is a playable word

echelle Scrabble® Dictionary

noun
pl. echelles
a device for spreading light into its component colors
41 Playable Words can be made from "ECHELLES"
   2-Letter Words (5 found)
   3-Letter Words (11 found)
   4-Letter Words (13 found)
   5-Letter Words (7 found)
   6-Letter Words (2 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)