NONUSER is a playable word

nonuser Scrabble® Dictionary

noun
pl. nonusers
one that is not a user
91 Playable Words can be made from "NONUSER"
   2-Letter Words (14 found)
   3-Letter Words (28 found)
   5-Letter Words (12 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)