natal plum vs edible fruit

natal plum and edible fruit both are nouns.

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

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

natal plum: edible scarlet plumlike fruit of a South African plant
edible fruit: edible reproductive body of a seed plant especially one having sweet flesh

natal plum (noun)	edible fruit (noun)
edible scarlet plumlike fruit of a South African plant	edible reproductive body of a seed plant especially one having sweet flesh
very large closely branched South African shrub having forked bright green spines and shiny leaves
South African shrub having forked spines and plumlike fruit; frequently used as hedging