guinea flower vs shrub

guinea flower and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
guinea flower	Yes	No	No	No
shrub	Yes	No	No	No

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

guinea flower: any of several Australasian evergreen vines widely cultivated in warm regions for their large bright yellow single flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of guinea flower include bush.

guinea flower (noun)	shrub (noun)
any of several Australasian evergreen vines widely cultivated in warm regions for their large bright yellow single flowers	a low woody perennial plant usually having several major stems