nubbin vs nub

nubbin and nub both are nouns.

Word	Noun	Adjective	Verb	Adverb
nubbin	Yes	No	No	No
nub	Yes	No	No	No

As nouns, nub is a hypernym of nubbin; that is, nub is a word with a broader meaning than nubbin:

Other hypernyms of nubbin include stub.

nubbin (noun)	nub (noun)
a small nub (especially an undeveloped fruit or ear of corn)	the choicest or most essential or most vital part of some idea or experience
	a small piece
	a small lump or protuberance