Benzoin odoriferum vs shrub

Benzoin odoriferum and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Benzoin odoriferum	Yes	No	No	No
shrub	Yes	No	No	No

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

Benzoin odoriferum: deciduous shrub of the eastern United States having highly aromatic leaves and bark and yellow flowers followed by scarlet or yellow berries
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Benzoin odoriferum include bush.

Benzoin odoriferum (noun)	shrub (noun)
deciduous shrub of the eastern United States having highly aromatic leaves and bark and yellow flowers followed by scarlet or yellow berries	a low woody perennial plant usually having several major stems