moss locust vs shrub

moss locust and shrub both are nouns.

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

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

moss 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 moss locust include bush.

moss 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