popular vs common

popular is not a noun while common is a noun.

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

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

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