juniper bush vs shrub

juniper bush and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
juniper bush	Yes	No	No	No
shrub	Yes	No	No	No

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

juniper bush: desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of juniper bush include bush.

juniper bush (noun)	shrub (noun)
desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista	a low woody perennial plant usually having several major stems