common -- (belonging to or participated in by a community as a whole; public; "for the common good"; "common lands are set aside for use by all members of a community")
common -- (having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual; "the common man"; "a common sailor"; "the common cold"; "a common nuisance"; "followed common procedure"; "it is common knowledge that she lives alone"; "the common housefly"; "a common brand of soap")
common, mutual -- (common to or shared by two or more parties; "a common friend"; "the mutual interests of management and labor")
common, usual -- (commonly encountered; "a common (or familiar) complaint"; "the usual greeting")
common, vernacular, vulgar -- (being or characteristic of or appropriate to everyday language; "common parlance"; "a vernacular term"; "vernacular speakers"; "the vulgar tongue of the masses"; "the technical and vulgar names for an animal species")
common, plebeian, vulgar, unwashed -- (of or associated with the great masses of people; "the common people in those days suffered greatly"; "behavior that branded him as common"; "his square plebeian nose"; "a vulgar and objectionable person"; "the unwashed masses")
coarse, common -- (of low or inferior quality or value; "of what coarse metal ye are molded"- Shakespeare; "produced...the common cloths used by the poorer population")
coarse, common, rough-cut, uncouth, vulgar -- (lacking refinement or cultivation or taste; "he had coarse manners but a first-rate mind"; "behavior that branded him as common"; "an untutored and uncouth human being"; "an uncouth soldier--a real tough guy"; "appealing to the vulgar taste for violence"; "the vulgar display of the newly rich")
common -- (to be expected; standard; "common decency")