old rose vs rose

old rose and rose both are nouns.

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

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

Other hypernyms of old rose include rosiness.

old rose (noun)	rose (noun)
a greyish-pink color	a dusty 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

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