Viburnum dentatum vs shrub

Viburnum dentatum and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Viburnum dentatum	Yes	No	No	No
shrub	Yes	No	No	No

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

Viburnum dentatum: deciduous shrub of eastern North America having blue-black berries and tough pliant wood formerly used to make arrows
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Viburnum dentatum include bush.

Viburnum dentatum (noun)	shrub (noun)
deciduous shrub of eastern North America having blue-black berries and tough pliant wood formerly used to make arrows	a low woody perennial plant usually having several major stems