heresiarchy

from The Collaborative International Dictionary of English v.0.48

Heresiarchy \Her"e*si*arch`y\, n.
   A chief or great heresy. [R.]
   [1913 Webster]

         The book itself [the Alcoran] consists of heresiarchies
         against our blessed Savior.              --Sir T.
                                                  Herbert.
   [1913 Webster]