Adenium multiflorum vs shrub

Adenium multiflorum and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Adenium multiflorum	Yes	No	No	No
shrub	Yes	No	No	No

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

Adenium multiflorum: South African shrub having a swollen succulent stem and bearing showy pink and white flowers after the leaves fall; popular as an ornamental in tropics
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Adenium multiflorum include bush.

Adenium multiflorum (noun)	shrub (noun)
South African shrub having a swollen succulent stem and bearing showy pink and white flowers after the leaves fall; popular as an ornamental in tropics	a low woody perennial plant usually having several major stems