If you're looking for alternative ways to describe someone who is not religious, there are several synonyms you can use. Some of these terms include secular, irreligious, atheistic, and agnostic. Secular refers to the separation of religion from government or daily life. Irreligious is a broader term that describes someone who does not practice organized religion or has no particular beliefs. Atheistic means that someone believes there is no god or gods. Agnosticism is the view that the existence of a god or gods cannot be known. These terms can help you to express yourself more accurately when it comes to nonreligious issues.