DEEPEST is a playable word

deep Scrabble® Dictionary

adjective
deeper, deepest
extending far down from a surface
noun
pl. deeps
a place or thing of great depth
50 Playable Words can be made from "DEEPEST"
   2-Letter Words (6 found)
   3-Letter Words (14 found)
   4-Letter Words (18 found)
   5-Letter Words (8 found)
   6-Letter Words (2 found)
   7-Letter Words (2 found)