The Collaborative International Dictionary of English v.0.48:

Supernaturalism \Su`per*nat"u*ral*ism\, n.
   1. The quality or state of being supernatural;
      supernaturalness.
      [1913 Webster]

   2. (Theol.) The doctrine of a divine and supernatural agency
      in the production of the miracles and revelations recorded
      in the Bible, and in the grace which renews and sanctifies
      men, -- in opposition to the doctrine which denies the
      agency of any other than physical or natural causes in the
      case. [Written also supranaturalism.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Supranaturalism \Su`pra*nat"u*ral*ism\, n.
   The state of being supernatural; belief in supernatural
   agency or revelation; supernaturalism.
   [1913 Webster]