goldenbush vs shrub

goldenbush and shrub both are nouns.

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

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

goldenbush: any of various much-branched yellow-flowered shrubs of the genus Chrysothamnus; western North America
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of goldenbush include bush.

goldenbush (noun)	shrub (noun)
a plant of the genus Haplopappus	a low woody perennial plant usually having several major stems
any of various much-branched yellow-flowered shrubs of the genus Chrysothamnus; western North America