LEFTEST is a playable word

left Scrabble® Dictionary

adjective
lefter, leftest
pertaining to the side of the body to the north when one faces east
noun
pl. lefts
the left side or hand
67 Playable Words can be made from "LEFTEST"
   2-Letter Words (6 found)
   3-Letter Words (18 found)
   5-Letter Words (12 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)