minniebush vs shrub

minniebush and shrub both are nouns.

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

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

Other hypernyms of minniebush include bush.

minniebush (noun)	shrub (noun)
low shrub of the eastern United States with downy twigs	a low woody perennial plant usually having several major stems