paganEnglishOxford American Thesauruspagan noun in prehistoric times, pagans used to worship the sun gods: heathen, infidel, idolater/idolatress, atheist, nontheist, irreligious person, agnostic, skeptic, heretic, apostate; archaic paynim. ▷antonyms believer.adjective the great pagan festival of the solar solstice: heathen; ungodly, irreligious, infidel, idolatrous, atheistic, nontheistic, agnostic, skeptical, faithless, impious; rare paganistic, paganish, apostatical, nullifidian, heathenish, heathenistic.