Synonyms and related words :
atheist, atheistic, creedless, disbelieving, distrustful, doubting, faithless, gentile, goyish, heathen, heretical, incredulous, infidel, infidelic, irreligious, minimifidian, misbelieving, mistrustful, mistrusting, non-Christian, non-Jewish, non-Mohammedan, non-Mormon, non-Moslem, non-Muhammadan, non-Muslim, nonbelieving, nullifidian, pagan, questioning, quizzical, repudiative, sceptical, skeptical, suspicious, unchristian, uncircumcised, unconfident, unconverted, unconvinced, unpersuaded, without faith