knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock

• airships
• air shot
• air shots
• airshow
• air shower
• airshows
• airsick
• air-sickness
• airside
• air sign
• air signs
• airspace
• airspaces
• airspeed
• airspeeds
• air-splint
• air-splints
• air station
• air stations
• airstop
• airstops
• airstream
• airstream mechanism
• airstreams
• air strike