Ochna serrulata vs shrub

Ochna serrulata and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ochna serrulata	Yes	No	No	No
shrub	Yes	No	No	No

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

Ochna serrulata: shrub with narrow-elliptic glossy evergreen leaves and yellow flowers with leathery petaloid sepals
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Ochna serrulata include bush.

Ochna serrulata (noun)	shrub (noun)
shrub with narrow-elliptic glossy evergreen leaves and yellow flowers with leathery petaloid sepals	a low woody perennial plant usually having several major stems