WordNet sense 1 (someone motivated by desires for sensual pleasures):

hedonist, pleasure seeker

WordNet sense 2 (a person who does not acknowledge your god):

gentile, heathen, infidel

WordNet sense 3 (not acknowledging the God of Christianity and Judaism and Islam):

ethnic, heathenish

WordNet sense 4 (hostile or indifferent to religion):

irreligious