NIELLOS is a playable word

niello Scrabble® Dictionary

noun
pl. niellos or nielli
a black metallic substance
verb
nielloed, nielloing, niellos
to decorate with niello
103 Playable Words can be made from "NIELLOS"
   2-Letter Words (15 found)
   3-Letter Words (25 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)