LAXEST is a playable word

lax Scrabble® Dictionary

adjective
laxer, laxest
not strict or stringent
noun
pl. laxes
a vowel articulated with relatively relaxed muscles
92 Playable Words can be made from "LAXEST"
   2-Letter Words (12 found)
   3-Letter Words (30 found)
   6-Letter Words (2 found)