The Oxford Thesaurus An A-Z Dictionary of Synonyms - godless adj.

1) wicked, evil, iniquitous, sinful, unrighteous, unholy, hellish; impious, blasphemous, profane, sacrilegious, ungodly: The prison was a godless place, where one was murdered for a crust of bread. 2) atheistic, nullifidian, agnostic, unbelieving, sceptical: In theory, communism is a godless ideology.