Catha edulis vs shrub

Catha edulis and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Catha edulis	Yes	No	No	No
shrub	Yes	No	No	No

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

Catha edulis: a shrub that is cultivated by Arabs for its leaves which are chewed or used to make tea
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Catha edulis include bush.

Catha edulis (noun)	shrub (noun)
a shrub that is cultivated by Arabs for its leaves which are chewed or used to make tea	a low woody perennial plant usually having several major stems