UNITER is a playable word

uniter Scrabble® Dictionary

noun
pl. uniters
one that unites
62 Playable Words can be made from "UNITER"
   2-Letter Words (12 found)
   3-Letter Words (19 found)
   4-Letter Words (17 found)
   5-Letter Words (12 found)
   6-Letter Words (2 found)