edible nut vs pine nut

edible nut and pine nut both are nouns.

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

As nouns, pine nut is a hyponym of edible nut; that is, pine nut is a word with a more specific, narrower meaning than edible nut:

edible nut: a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell
pine nut: edible seed of any of several nut pines especially some pinons of southwestern North America

edible nut (noun)	pine nut (noun)
a hard-shelled seed consisting of an edible kernel or meat enclosed in a woody or leathery shell	edible seed of any of several nut pines especially some pinons of southwestern North America