uncommon vs red carpet

uncommon is not a noun while red carpet is a noun.

Word	Noun	Adjective	Verb	Adverb
uncommon	No	Yes	No	No
red carpet	Yes	Yes	No	No

uncommon (noun)	red carpet (noun)
	a strip of red carpeting laid down for dignitaries to walk on

uncommon (adjective)	red carpet (adjective)
not common or ordinarily encountered; unusually great in amount or remarkable in character or kind	special treatment or hospitality
marked by an uncommon quality; especially superlative or extreme of its kind