heathen
Definitions
A person who does not belong to a widely held religion, especially one who is not a Christian, Jew, or Muslim.
An irreligious, uncivilized, or unenlightened person.
Examples
The ancient tribe was dismissed as a group of heathens by the explorers who did not understand their customs.
He jokingly called his friend a heathen for putting pineapple on his pizza.
Synonyms
pagan infidel heretic nonbeliever unbeliever atheist agnostic