LETHES is a playable word

lethe Scrabble® Dictionary

noun
pl. lethes
forgetfulness
(adjective) lethean
50 Playable Words can be made from "LETHES"
   2-Letter Words (7 found)
   3-Letter Words (16 found)
   4-Letter Words (16 found)
   5-Letter Words (10 found)
   6-Letter Words (1 found)