guelder rose vs shrub

guelder rose and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
guelder rose	Yes	No	No	No
shrub	Yes	No	No	No

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

guelder rose: deciduous thicket-forming Old World shrub with clusters of white flowers and small bright red berries
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of guelder rose include bush.

guelder rose (noun)	shrub (noun)
deciduous thicket-forming Old World shrub with clusters of white flowers and small bright red berries	a low woody perennial plant usually having several major stems