dombeya vs shrub

dombeya and shrub both are nouns.

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

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

dombeya: any of various shrubs or small trees of the genus Dombeya grown for their rounded clusters of exquisite often sweet-scented flowers usually hanging beneath the leaves
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of dombeya include bush.

dombeya (noun)	shrub (noun)
any of various shrubs or small trees of the genus Dombeya grown for their rounded clusters of exquisite often sweet-scented flowers usually hanging beneath the leaves	a low woody perennial plant usually having several major stems