Belief systems are an important part of many cultures and societies. Orthodoxies (11 letters) are a set of beliefs that are accepted as true by a particular group or culture. CREEDS (6 letters) are formal statements of religious belief, often recited in churches. ISMS (4 letters) are ideologies or philosophies that are based on a set of beliefs. CREDOS (6 letters) are a set of beliefs or principles that guide the behavior of a person or group. Faiths (6 letters) are a strong belief in a religion or system of beliefs. All of these terms are related to belief systems and can be used to describe different aspects of them.