NIELLI is a playable word

niello Scrabble® Dictionary

noun
pl. niellos or nielli
a black metallic substance
verb
nielloed, nielloing, niellos
to decorate with niello
15 Playable Words can be made from "NIELLI"
   2-Letter Words (5 found)
   3-Letter Words (6 found)
   4-Letter Words (3 found)
   6-Letter Words (1 found)