Mysore thorn vs shrub

Mysore thorn and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mysore thorn	Yes	No	No	No
shrub	Yes	No	No	No

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

Mysore thorn: spreading thorny shrub of tropical Asia bearing large erect racemes of red-marked yellow flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Mysore thorn include bush.

Mysore thorn (noun)	shrub (noun)
spreading thorny shrub of tropical Asia bearing large erect racemes of red-marked yellow flowers	a low woody perennial plant usually having several major stems