knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock

• sponge cake
• sponge cakes
• sponge cloth
• sponge cloths
• sponged
• sponge down
• sponge-down
• sponge finger
• sponge fingers
• sponge fisher
• sponge fishers
• sponge fishing
• spongeous
• sponger
• spongers
• sponge rubber
• sponges
• spongeware
• spongewares
• spongewood
• spongewoods
• spongicolous
• spongier
• spongiest
• spongiform