NIELLOING is a playable word

niello Scrabble® Dictionary

noun
pl. niellos or nielli
a black metallic substance
verb
nielloed, nielloing, niellos
to decorate with niello
84 Playable Words can be made from "NIELLOING"
   2-Letter Words (12 found)
   3-Letter Words (22 found)
   5-Letter Words (12 found)
   6-Letter Words (9 found)
   7-Letter Words (1 found)
   8-Letter Words (3 found)
   9-Letter Words (1 found)