TARTAR is a playable word

tartar Scrabble® Dictionary

noun
pl. tartars
a crust on the teeth
(adjective) tartaric
13 Playable Words can be made from "TARTAR"
   2-Letter Words (4 found)
   3-Letter Words (5 found)
   4-Letter Words (1 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)