Chilean firebush vs shrub

Chilean firebush and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chilean firebush	Yes	No	No	No
shrub	Yes	No	No	No

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

Chilean firebush: grown for outstanding display of brilliant usually scarlet-crimson flowers; Andes
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Chilean firebush include bush.

Chilean firebush (noun)	shrub (noun)
grown for outstanding display of brilliant usually scarlet-crimson flowers; Andes	a low woody perennial plant usually having several major stems