FENNIEST is a playable word

fenny Scrabble® Dictionary

adjective
fennier, fenniest
marshy
111 Playable Words can be made from "FENNIEST"
   2-Letter Words (13 found)
   3-Letter Words (30 found)
   6-Letter Words (10 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)