Leucothoe editorum vs shrub

Leucothoe editorum and shrub both are nouns.

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

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

Leucothoe editorum: fast-growing evergreen shrub of southeastern United States having arching interlaced branches and racemes of white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Leucothoe editorum include bush.

Leucothoe editorum (noun)	shrub (noun)
fast-growing evergreen shrub of southeastern United States having arching interlaced branches and racemes of white flowers	a low woody perennial plant usually having several major stems