common vs popular

common is a noun but popular is not a noun.

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

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

common (adjective)	popular (adjective)
having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual	regarded with great favor, approval, or affection especially by the general public
belonging to or participated in by a community as a whole; public	carried on by or for the people (or citizens) at large
commonly encountered	(of music or art) new and of general appeal (especially among young people)
of low or inferior quality or value	representing or appealing to or adapted for the benefit of the people at large
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