ecclesiarchy means A government ruled by or in conjunction with a religion; a church-state. Lexicurio rates it Sui generis — a strength score of 89 out of 100.
Why “ecclesiarchy” is a great word
ECCLESIARCHY — [Noun] A system of governance where political and religious authority are institutionally fused, a formal union of church and state. From ecclesio- (a combining form from Greek ekklēsia, meaning "assembly" or "church") + -archy (from Greek -arkhia, meaning "rule" or "government"). Unlike theocracy, which suggests rule by divine guidance or its conduits, or secularism, which enforces a strict separation of powers, ecclesiarchy is defined by its structural entanglement—the bishop in the cabinet, the canon law in the constitution, the state tithe flowing into the cathedral's vault. It is the weight of incense in the council chamber, the soldier kneeling to an archbishop, the cathedral's shadow falling across the parliament house; a world where faith is not a private conviction but the very mortar of public order.
Etymology
From ecclesio- + -archy.
noun
- A government ruled by or in conjunction with a religion; a church-state.
- Union of church and state.