wild plum vs edible fruit

wild plum and edible fruit both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild plum	Yes	No	No	No
edible fruit	Yes	No	No	No

As nouns, edible fruit is a hypernym of wild plum; that is, edible fruit is a word with a broader meaning than wild plum:

wild plum: fruit of the wild plum of southern United States
edible fruit: edible reproductive body of a seed plant especially one having sweet flesh

wild plum (noun)	edible fruit (noun)
fruit of the wild plum of southern United States	edible reproductive body of a seed plant especially one having sweet flesh
an uncultivated plum tree or shrub