holly-leaves barberry vs shrub

holly-leaves barberry and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
holly-leaves barberry	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of holly-leaves barberry; that is, shrub is a word with a broader meaning than holly-leaves barberry:

holly-leaves barberry: ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of holly-leaves barberry include bush.

holly-leaves barberry (noun)	shrub (noun)
ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries	a low woody perennial plant usually having several major stems