nub vs pith

nub and pith both are nouns.

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

As nouns, nub and pith are synonyms defined as:

nub and pith: the choicest or most essential or most vital part of some idea or experience

nub (noun)	pith (noun)
the choicest or most essential or most vital part of some idea or experience	the choicest or most essential or most vital part of some idea or experience
a small piece	soft spongelike central cylinder of the stems of most flowering plants
a small lump or protuberance

nub (verb)	pith (verb)
	remove the pith from (a plant)