knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock

• do one's nut
• do one's own thing
• do one's stuff
• do one's thing
• do one's worst
• door
• doorbell
• doorbells
• doorcase
• doorcases
• door-cheek
• door-cheeks
• do-or-die
• doorframe
• doorframes
• doorkeeper
• doorkeepers
• doorknob
• doorknobs
• doorknock
• doorknocker
• doorknockers
• doorknocks
• doorman
• doormat