A CREDO is a system of principles or beliefs, usually religious in nature, that are held to be true by a particular group. A Creed is a statement of faith or belief, often used in a religious context. An ISM is a distinctive doctrine, theory, system, or practice, especially one that is generally accepted. TENETS are a set of beliefs, principles, or doctrines that form the basis of a system of thought or action. An ETHIC is a moral philosophy or code of morals accepted by a particular group or culture. CREDOS and ISMS are plural forms of CREDO and ISM, respectively. All of these terms refer to a system of principles or beliefs.