NIFTIER is a playable word

nifty Scrabble® Dictionary

adjective
niftier, niftiest
stylish; pleasing
(adverb) niftily
noun
pl. nifties
something that is nifty
66 Playable Words can be made from "NIFTIER"
   2-Letter Words (12 found)
   3-Letter Words (20 found)
   5-Letter Words (9 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)