Japanese allspice vs shrub

Japanese allspice and shrub both are nouns.

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

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

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

Other hypernyms of Japanese allspice include bush.

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