As a noun nubble is
a small knob or lump.
As a verb nubble is
(obsolete) to beat or bruise with the fist.
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English
Noun
(
en noun)
A small knob or lump.
*1897 , Kipling, Captains Courageous ,
- Harvey saw with disgust that there were no sheets on his bed-place. He was lying on a piece of dingy ticking full of lumps and nubbles .
Verb
(
nubbl)
(obsolete) To beat or bruise with the fist.
- (Ainsworth)
(
Webster 1913)