MITIER is a playable word

mity Scrabble® Dictionary

adjective
mitier, mitiest
infested with mites
37 Playable Words can be made from "MITIER"
   2-Letter Words (9 found)
   3-Letter Words (8 found)
   4-Letter Words (14 found)
   5-Letter Words (5 found)
   6-Letter Words (1 found)