The term "philosophy of religion" can also be referred to as "theology," which is the study of the nature of God and the role of religion in human life. "Metaphysics" is another synonym for philosophy of religion, as it deals with questions about the ultimate nature of reality, including the existence of God. "Epistemology" can also be used, since it focuses on how we know and understand religious concepts and ideas. "Ethics" is a related term, as it deals with questions about the moral implications of religious beliefs and practices. Overall, the philosophy of religion can be explored through a variety of lenses and fields of study.