hagio- = saint or holy
hagiocracy = government by the priesthood
hagiographer = someone who writes about saints
hagiolatry = the worship of saints
hagiologist = someone who studies saints
hagiophobia = fear of or aversion to saints or holy things
hagioscope = an opening in an interior church wall to afford a view of the high altar
hagiotherapy = medical treatment involving prayer, visits to shrines and/or contact with relics or holy objects