KNOTTER is a playable word

knotter Scrabble® Dictionary

noun
pl. knotters
one that knots
70 Playable Words can be made from "KNOTTER"
   2-Letter Words (12 found)
   3-Letter Words (20 found)
   5-Letter Words (12 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)