rose vs rosebush

rose and rosebush both are nouns.

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

As nouns, rose and rosebush are synonyms defined as:

rose (noun)	rosebush (noun)
a dusty pink color	any of many shrubs of the genus Rosa that bear roses
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)	rosebush (adjective)
of something having a dusty purplish pink color