split, Scism, misunderstanding, difference of opinion, difference, interdispute, breach, rupture, disaccord, dispute, more...

unity, unification, integration

great, religious, papal, open, major, donatist, western, serious, political, internal, deep

religious rifts,   ideological splits,   religious split,   philosophical rift,   church division,   religious rift,   societal division,   rift in,   internal division,   mental divide