Belief is a strong conviction that something is true or real. It is often based on FAITH, trust, or confidence in a person, thing, or idea. PIETY (5 letters) is a devotion to religious principles and practices. LAW (3 letters) is a system of rules and regulations that are enforced by a governing authority. CODE (4 letters) is a set of rules or standards that are used to regulate behavior. ISM (3 letters) is a distinctive doctrine, theory, or practice. CREDO (5 letters) is a statement of beliefs or principles. Creed (5 letters) is a formal statement of religious belief. DOGMA (5 letters) is a principle or set of principles laid down by an authority as incontrovertibly true. ETHOS (5 letters) is the characteristic spirit of a culture, era, or community as manifested in its attitudes and aspirations. FAITH (5 letters) is complete trust or confidence in someone or something. TENET (5 letters) is a principle, belief, or doctrine generally held to be true. NOTION (6 letters) is a general understanding or impression of something. OPINION (7 letters) is a view or judgment formed about something, not necessarily based on fact or knowledge. CREDENCE (8 letters) is belief in or acceptance of something as true.