knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock

• zero-emission vehicles
• zero fuel weight
• zero-grazing
• zero hour
• zero-hour contract
• zero hours
• zero-hours contract
• zero in
• zeroing
• zero in on
• zero option
• zero options
• zero-point energy
• zero-power reactor
• zero-power reactors
• zero-rate
• zero-rated
• zero-rates
• zero-rating
• zeros
• zero-sum
• zeroth
• zero tolerance
• zero-valent
• zero-zero