Japan allspice vs shrub

Japan allspice and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japan allspice	Yes	No	No	No
shrub	Yes	No	No	No

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

Japan allspice: deciduous Japanese shrub cultivated for its fragrant yellow flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Japan allspice include bush.

Japan allspice (noun)	shrub (noun)
deciduous Japanese shrub cultivated for its fragrant yellow flowers	a low woody perennial plant usually having several major stems