NICENESS is a playable word

niceness Scrabble® Dictionary

noun
pl. nicenesses
the quality of being nice
65 Playable Words can be made from "NICENESS"
   2-Letter Words (6 found)
   3-Letter Words (15 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)
   8-Letter Words (2 found)