Cajanus cajan vs shrub

Cajanus cajan and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cajanus cajan	Yes	No	No	No
shrub	Yes	No	No	No

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

Cajanus cajan: tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Cajanus cajan include bush.

Cajanus cajan (noun)	shrub (noun)
tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics	a low woody perennial plant usually having several major stems