knobbˈle noun

A small knob

knobbˈly or knobbˈy adjective

1. Having, or full of, knobs
2. Knotty

knobˈhead noun (vulgar sl)

1. An idiot
2. Someone despised

knobˈstick noun

1. A stick with a knobbed head
2. A blackleg or scab (obs sl)

with (brass) knobs on (informal)

With interest, more so

knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock