cotoneaster vs shrub

cotoneaster and shrub both are nouns.

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

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

cotoneaster: any shrub of the genus Cotoneaster: erect or creeping shrubs having richly colored autumn foliage and many small white to pinkish flowers followed by tiny red or black fruits
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of cotoneaster include bush.

cotoneaster (noun)	shrub (noun)
any shrub of the genus Cotoneaster: erect or creeping shrubs having richly colored autumn foliage and many small white to pinkish flowers followed by tiny red or black fruits	a low woody perennial plant usually having several major stems