Is it ensure, insure, or assure?
any of the periodic gatherings of bishops of the Anglican Communion held initially (1867-1968) at Lambeth Palace (the London house of the archbishop of Canterbury) and, since 1978, at Canterbury, England. They are important as a means of expressing united Anglican opinion, but the Anglican Communion has no central, authoritative government. The bishops meet and deliberate as equals, with the archbishop of Canterbury as host and chairman. The time between conferences has varied, but the normal interval is 10 years.