Diervilla lonicera vs shrub

Diervilla lonicera and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Diervilla lonicera	Yes	No	No	No
shrub	Yes	No	No	No

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

Diervilla lonicera: spreading bush of northeastern United States having small clusters of fragrant green and yellow flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Diervilla lonicera include bush.

Diervilla lonicera (noun)	shrub (noun)
spreading bush of northeastern United States having small clusters of fragrant green and yellow flowers	a low woody perennial plant usually having several major stems