The Collaborative International Dictionary of English v.0.48:

Preternaturalism \Pre`ter*nat"u*ral*ism\, n.
   The state of being preternatural; a preternatural condition.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "preternaturalism":
   eeriness, elfdom, faerie, miraculousness, mysteriousness, mystery,
   numinousness, otherworldliness, superhumanity, supernaturalism,
   supernaturality, supernaturalness, supernature, supernormalness,
   superphysicalness, supersensibleness, supranaturalism, supranature,
   the occult, the supernatural, the supersensible, transcendentalism,
   unearthliness, unworldliness, witchery