MIXT is a playable word

mix Scrabble® Dictionary

verb
mixed or mixt, mixing, mixes
to put together into one mass
(adjective) mixable, mixible (adverb) mixedly
7 Playable Words can be made from "MIXT"
   2-Letter Words (4 found)
   3-Letter Words (2 found)
   4-Letter Words (1 found)