Religious groups are composed of various ORDERS, clergies, SECTS, and CULTS. ORDERS are organizations of people who have taken religious vows and live according to a specific set of rules. Clergies are members of the clergy, or those who are ordained to perform religious ceremonies and rituals. SECTS are smaller religious groups that have broken away from a larger religion. CULTS are religious groups that have beliefs and practices that are considered unorthodox or extreme by mainstream religions.