Lyonia ligustrina vs shrub

Lyonia ligustrina and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lyonia ligustrina	Yes	No	No	No
shrub	Yes	No	No	No

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

Lyonia ligustrina: deciduous much-branched shrub with dense downy panicles of small bell-shaped white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Lyonia ligustrina include bush.

Lyonia ligustrina (noun)	shrub (noun)
deciduous much-branched shrub with dense downy panicles of small bell-shaped white flowers	a low woody perennial plant usually having several major stems