rose vs old rose

rose and old rose both are nouns.

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

As nouns, old rose is a hyponym of rose; that is, old rose is a word with a more specific, narrower meaning than rose:

rose (noun)	old rose (noun)
a dusty pink color	a greyish-pink color
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)	old rose (adjective)
of something having a dusty purplish pink color