SNELLEST is a playable word

snell Scrabble® Dictionary

adjective
sneller, snellest
keen
verb
snelled, snelling, snells
to attach a short line to a fishhook
89 Playable Words can be made from "SNELLEST"
   2-Letter Words (6 found)
   3-Letter Words (18 found)
   6-Letter Words (9 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)