What is another word for "agency"?

Roget's Thesaurus (1911) lists these synonyms for "agency": accession, accoucheur, accoucheuse, act, acting, action, agent, agentship, aid, all, along, anchor, and, any, appointment, assignment, assistance, attorney, authority, bear, bird, bow, brevet, bring, capital, captive, capture, causation, charge, charter, clerkship, close, come, commission, conducive, consignee, consignment, coronation, crook, custody.