rose vs shrub

rose and shrub both are nouns.

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

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

Other hypernyms of rose include bush.

rose (noun)	shrub (noun)
a dusty pink color	a low woody perennial plant usually having several major stems
pinkish table wine from red grapes whose skins were removed after fermentation began
any of many shrubs of the genus Rosa that bear roses

rose (adjective)	shrub (adjective)
of something having a dusty purplish pink color