bearberry vs shrub

bearberry and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bearberry	Yes	No	No	No
shrub	Yes	No	No	No

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

Other hypernyms of bearberry include bush.

bearberry (noun)	shrub (noun)
chiefly evergreen subshrubs of northern to Arctic areas	a low woody perennial plant usually having several major stems
deciduous shrub of southeastern and central United States
shrubby tree of the Pacific coast of the United States; yields cascara sagrada