FELLEST is a playable word

fell Scrabble® Dictionary

adjective
feller, fellest
cruel
verb
felled, felling, fells
to cause to fall
67 Playable Words can be made from "FELLEST"
   2-Letter Words (6 found)
   3-Letter Words (18 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)