FLEETEST is a playable word

fleet Scrabble® Dictionary

adjective
fleeter, fleetest
swift
(adverb) fleetly
verb
fleeted, fleeting, fleets
to move swiftly
70 Playable Words can be made from "FLEETEST"
   2-Letter Words (6 found)
   3-Letter Words (18 found)
   5-Letter Words (12 found)
   6-Letter Words (5 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)