kernel vs pith

kernel and pith both are nouns.

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

As nouns, kernel and pith are synonyms defined as:

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

kernel (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 single whole grain of a cereal	soft spongelike central cylinder of the stems of most flowering plants
the inner and usually edible part of a seed or grain or nut or fruit stone

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