KNUCKLING is a playable word

knuckle Scrabble® Dictionary

verb
knuckled, knuckling, knuckles
to hit with the knuckles (the joints of the fingers)
55 Playable Words can be made from "KNUCKLING"
   2-Letter Words (6 found)
   3-Letter Words (17 found)
   4-Letter Words (18 found)
   5-Letter Words (7 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)