Ziziphus jujuba vs shrub

Ziziphus jujuba and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ziziphus jujuba	Yes	No	No	No
shrub	Yes	No	No	No

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

Other hypernyms of Ziziphus jujuba include bush.

Ziziphus jujuba (noun)	shrub (noun)
spiny tree having dark red edible fruits	a low woody perennial plant usually having several major stems