Leucothoe racemosa vs shrub

Leucothoe racemosa and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Leucothoe racemosa	Yes	No	No	No
shrub	Yes	No	No	No

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

Leucothoe racemosa: bushy deciduous shrub of the eastern United States with long racemes of pinkish flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Leucothoe racemosa include bush.

Leucothoe racemosa (noun)	shrub (noun)
bushy deciduous shrub of the eastern United States with long racemes of pinkish flowers	a low woody perennial plant usually having several major stems