Synonyms of 'atheistic'
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If you say that a person or group of people is godless, you disapprove of them because they do not believe in God.
a godless and alienated society
Heathen means having no religion, or belonging to a religion that is not Christianity, Judaism, or Islam.
a heathen temple
Thesaurus for atheistic from the Collins English Thesaurus
Atheistic means connected with or holding the belief that there is no God .