hickory nut vs edible nut

hickory nut and edible nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
hickory nut	Yes	No	No	No
edible nut	Yes	No	No	No

As nouns, edible nut is a hypernym of hickory nut; that is, edible nut is a word with a broader meaning than hickory nut:

hickory nut: small hard-shelled nut of North American hickory trees especially the shagbark hickories
edible nut: a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell

hickory nut (noun)	edible nut (noun)
small hard-shelled nut of North American hickory trees especially the shagbark hickories	a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell