Ardisia escallonoides vs shrub

Ardisia escallonoides and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ardisia escallonoides	Yes	No	No	No
shrub	Yes	No	No	No

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

Ardisia escallonoides: tropical American shrub or small tree with brown wood and dark berries
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Ardisia escallonoides include bush.

Ardisia escallonoides (noun)	shrub (noun)
tropical American shrub or small tree with brown wood and dark berries	a low woody perennial plant usually having several major stems