ISM is an acronym for 'Ideas, Systems, and Methods' and is used to describe a set of beliefs or principles. DOCTRINE is an official set of beliefs or principles, DOGMA is a set of beliefs that are accepted without question, TENET is a principle or BELIEF that is held to be true, BELIEF is a feeling of certainty about something, CREDO is a set of beliefs or principles that someone lives by, IDEOLOGY is a set of beliefs or ideas that form the basis of a political, economic, or social system, CULT is a group of people who share a set of beliefs or practices, and DOXY is a set of beliefs or opinions.