African hemp vs shrub

African hemp and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
African hemp	Yes	No	No	No
shrub	Yes	No	No	No

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

African hemp: large shrub of South Africa having many conspicuously hairy branches with large hairy leaves and clusters of conspicuous white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of African hemp include bush.

African hemp (noun)	shrub (noun)
large shrub of South Africa having many conspicuously hairy branches with large hairy leaves and clusters of conspicuous white flowers	a low woody perennial plant usually having several major stems
bowstring hemp of South Africa