Prunus laurocerasus vs shrub

Prunus laurocerasus and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus laurocerasus	Yes	No	No	No
shrub	Yes	No	No	No

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

Prunus laurocerasus: frequently cultivated Eurasian evergreen shrub or small tree having showy clusters of white flowers and glossy foliage and yielding oil similar to bitter almond oil
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Prunus laurocerasus include bush.

Prunus laurocerasus (noun)	shrub (noun)
frequently cultivated Eurasian evergreen shrub or small tree having showy clusters of white flowers and glossy foliage and yielding oil similar to bitter almond oil	a low woody perennial plant usually having several major stems