jujube vs shrub

jujube and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
jujube	Yes	No	No	No
shrub	Yes	No	No	No

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

Other hypernyms of jujube include bush.

jujube (noun)	shrub (noun)
chewy fruit-flavored jellied candy (sometimes medicated to soothe a sore throat)	a low woody perennial plant usually having several major stems
dark red plumlike fruit of Old World buckthorn trees
spiny tree having dark red edible fruits