(1)神职政体
指僧侣统治。

(2)教阶制度
指按权力及权威的大小而组成的由低到高逐级相属的教会或神职机构的等级职官体系。

(3)等级制度；等级体系

• arcana imperii
• arcarius
• arceevesque
• arcessere
• arcewesche
• archabbot
• Archaionomia
• Archaionomia, sive de priscis Anglorum legis.
• archbishop
• Archbishop of Canterbury
• Archbishop of York
• archbishopric
• archdeacon
• archdeaconry
• archdeacon's court
• archdeanery
• Archeion
• archery
• arches
• Arches Court
• archetype
• archicapellanus
• archidiaconal courts
• archidiaconus
• archiepiscopal