otherworldly vs preternatural

otherworldly

adj
  • Not belonging to the real world; unnatural; odd and unfamiliar. 

  • Of, concerned with, or preoccupied with a different world than that of the tangible here and now, such as a heavenly, spiritual, or imaginary world. 

preternatural

adj
  • Beyond or not conforming to what is natural or according to the regular course of things; strange. 

How often have the words otherworldly and preternatural occurred in a corpus of books? (source: Google Ngram Viewer )