Synonyms and related words :
apostate, atheist, backsliding, blasphemous, disbelieving, faithless, fallen, fallen from grace, gentile, goyish, heathen, impious, infidel, infidelic, irreligious, irreverent, lapsed, minimifidian, misbelieving, non-Christian, non-Jewish, non-Mohammedan, non-Mormon, non-Moslem, non-Muhammadan, non-Muslim, nullifidian, pagan, profanatory, profane, recidivist, recidivistic, recreant, renegade, sacrilegious, unbelieving, unchristian, uncircumcised, undutiful