LETHEAN is a playable word

lethe Scrabble® Dictionary

noun
pl. lethes
forgetfulness
(adjective) lethean
95 Playable Words can be made from "LETHEAN"
   2-Letter Words (16 found)
   3-Letter Words (30 found)
   5-Letter Words (11 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)