amorpha vs shrub

amorpha and shrub both are nouns.

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

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

amorpha: any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of amorpha include bush.

amorpha (noun)	shrub (noun)
any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers	a low woody perennial plant usually having several major stems