Chimonanthus praecox vs shrub

Chimonanthus praecox and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chimonanthus praecox	Yes	No	No	No
shrub	Yes	No	No	No

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

Chimonanthus praecox: deciduous Japanese shrub cultivated for its fragrant yellow flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Chimonanthus praecox include bush.

Chimonanthus praecox (noun)	shrub (noun)
deciduous Japanese shrub cultivated for its fragrant yellow flowers	a low woody perennial plant usually having several major stems