Camellia sinensis vs shrub

Camellia sinensis and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Camellia sinensis	Yes	No	No	No
shrub	Yes	No	No	No

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

Camellia sinensis: a tropical evergreen shrub or small tree extensively cultivated in e.g. China and Japan and India; source of tea leaves
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Camellia sinensis include bush.

Camellia sinensis (noun)	shrub (noun)
a tropical evergreen shrub or small tree extensively cultivated in e.g. China and Japan and India; source of tea leaves	a low woody perennial plant usually having several major stems