parrot's bill vs clianthus

parrot's bill and clianthus both are nouns.

Word	Noun	Adjective	Verb	Adverb
parrot's bill	Yes	No	No	No
clianthus	Yes	No	No	No

As nouns, clianthus is a hypernym of parrot's bill; that is, clianthus is a word with a broader meaning than parrot's bill:

parrot's bill: evergreen shrub with scarlet to white clawlike or beaklike flowers; New Zealand
clianthus: any of various shrubs or vines of the genus Clianthus having compound leaves and pea-like red flowers in drooping racemes

Other hypernyms of parrot's bill include glory pea.

parrot's bill (noun)	clianthus (noun)
evergreen shrub with scarlet to white clawlike or beaklike flowers; New Zealand	any of various shrubs or vines of the genus Clianthus having compound leaves and pea-like red flowers in drooping racemes