wheat berry vs caryopsis

wheat berry and caryopsis both are nouns.

Word	Noun	Adjective	Verb	Adverb
wheat berry	Yes	No	No	No
caryopsis	Yes	No	No	No

As nouns, caryopsis is a hypernym of wheat berry; that is, caryopsis is a word with a broader meaning than wheat berry:

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

Other hypernyms of wheat berry include grain.

wheat berry (noun)	caryopsis (noun)
grains of common wheat; sometimes cooked whole or cracked as cereal; usually ground into flour	dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
a grain of wheat