Godless
Part of speech: adjective
Definition: Not acknowledging any deity or god; without belief in any deity or god. An atheist. evil, wicked, other-worldly.
Example sentence: Overall, we think religion is a good thing. I mean, if we were godless society, we would have many other problems; the communists found that out.
Impious
Part of speech: adjective
Definition: not piouslacking reverence or respect, especially towards a god