uncommon vs common

uncommon is not a noun while common is a noun.

Word	Noun	Adjective	Verb	Adverb
uncommon	No	Yes	No	No
common	Yes	Yes	No	No

uncommon (noun)	common (noun)
	a piece of open land for recreational use in an urban area

uncommon (adjective)	common (adjective)
not common or ordinarily encountered; unusually great in amount or remarkable in character or kind	having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual
marked by an uncommon quality; especially superlative or extreme of its kind	belonging to or participated in by a community as a whole; public
	commonly encountered
	of low or inferior quality or value
	being or characteristic of or appropriate to everyday language
	of or associated with the great masses of people
	to be expected; standard
	common to or shared by two or more parties
	lacking refinement or cultivation or taste