caryopsis vs kernel

caryopsis and kernel both are nouns.

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

As nouns, kernel is a hyponym of caryopsis; that is, kernel is a word with a more specific, narrower meaning than caryopsis:

caryopsis: dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
kernel: a single whole grain of a cereal

Other hyponyms of caryopsis include amaranth, barleycorn, wheat berry, rye.

caryopsis (noun)	kernel (noun)
dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn	the choicest or most essential or most vital part of some idea or experience
	a single whole grain of a cereal
	the inner and usually edible part of a seed or grain or nut or fruit stone