Dovyalis caffra vs shrub

Dovyalis caffra and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dovyalis caffra	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of Dovyalis caffra; that is, shrub is a word with a broader meaning than Dovyalis caffra:

Dovyalis caffra: vigorous South African spiny shrub grown for its round yellow juicy edible fruits
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Dovyalis caffra include bush.

Dovyalis caffra (noun)	shrub (noun)
vigorous South African spiny shrub grown for its round yellow juicy edible fruits	a low woody perennial plant usually having several major stems