natal plum vs Carissa bispinosa

natal plum and Carissa bispinosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
natal plum	Yes	No	No	No
Carissa bispinosa	Yes	No	No	No

As nouns, natal plum and Carissa bispinosa are synonyms defined as:

natal plum and Carissa bispinosa: South African shrub having forked spines and plumlike fruit; frequently used as hedging

Other synonyms of natal plum include hedge thorn.

natal plum (noun)	Carissa bispinosa (noun)
edible scarlet plumlike fruit of a South African plant	South African shrub having forked spines and plumlike fruit; frequently used as hedging
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