NITTIER is a playable word

nitty Scrabble® Dictionary

adjective
nittier, nittiest
full of nits
50 Playable Words can be made from "NITTIER"
   2-Letter Words (9 found)
   3-Letter Words (12 found)
   4-Letter Words (15 found)
   5-Letter Words (9 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)