S: (n) council (a body serving in an administrative capacity) "student council"
S: (n) secretariat, secretariate (an administrative unit responsible for maintaining records and other secretarial duties; especially for international organizations)
S: (n) committee, commission (a special group delegated to consider some matter) "a committee is a group that keeps minutes and loses hours" - Milton Berle
S: (n) unit, social unit (an organization regarded as part of a larger social group) "the coach said the offensive unit did a good job"; "after the battle the soldier had trouble rejoining his unit"