bristly locust vs shrub

bristly locust and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bristly locust	Yes	No	No	No
shrub	Yes	No	No	No

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

bristly locust: large shrub or small tree of the eastern United States having bristly stems and large clusters of pink flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of bristly locust include bush.

bristly locust (noun)	shrub (noun)
large shrub or small tree of the eastern United States having bristly stems and large clusters of pink flowers	a low woody perennial plant usually having several major stems