rosaceous vs rose

rosaceous is not a noun while rose is a noun.

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

As adjectives, rosaceous and rose are synonyms defined as:

Other synonyms of rosaceous include roseate.

rosaceous (noun)	rose (noun)
	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

rosaceous (adjective)	rose (adjective)
of or pertaining to or characteristic of plants of the family Rosaceae	of something having a dusty purplish pink color
of something having a dusty purplish pink color