DEADEST is a playable word

dead Scrabble® Dictionary

adjective
deader, deadest
deprived of life
noun
pl. deads
the period of greatest intensity
79 Playable Words can be made from "DEADEST"
   2-Letter Words (11 found)
   3-Letter Words (24 found)
   6-Letter Words (3 found)
   7-Letter Words (3 found)