Related Clues:

• Knot
• Tree protuberance
• Tangle
• Distort
• Twist
• Contort
• Knot up
• Tree knot
• Bend out of shape
• Bump on a log
• Knot in a tree
• Twist out of shape
• Protruding knot on a tree
• Twist into a knot
• Growl