Archiepiscopacy :: Archiepiscopacy (n.) That form of episcopacy in which the chief power is in the hands of archbishops.
Archiepiscopal :: Archiepiscopal (a.) Of or pertaining to an archbishop; as, Canterbury is an archiepiscopal see..
Archiepiscopality :: Archiepiscopality (n.) The station or dignity of an archbishop; archiepiscopacy.