pinwheel flower vs shrub

pinwheel flower and shrub both are nouns.

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

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

pinwheel flower: tropical shrub having glossy foliage and fragrant nocturnal flowers with crimped or wavy corollas; northern India to Thailand
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of pinwheel flower include bush.

pinwheel flower (noun)	shrub (noun)
tropical shrub having glossy foliage and fragrant nocturnal flowers with crimped or wavy corollas; northern India to Thailand	a low woody perennial plant usually having several major stems