LETHAL is a playable word

lethal Scrabble® Dictionary

noun
pl. lethals
a death-causing genetic defect
52 Playable Words can be made from "LETHAL"
   2-Letter Words (12 found)
   3-Letter Words (19 found)
   4-Letter Words (19 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)