hierarchy
hi.er.ar.chy \'hi--(*-).ra:r-ke-\ n 1: a division of angels 2a: a ruling body of clergy organized into orders or ranks each subordinate to the one above it; specif : the bishops of a province or nation 2b: church government by a hierarchy 3: a body of persons in authority 4a: arrangement into a graded series 4b: persons or other entities arranged in a series