The Collaborative International Dictionary of English v.0.48:

Wonderwork \Won"der*work`\, n. [AS. wundorweorc.]
   A wonderful work or act; a prodigy; a miracle.
   [1913 Webster]

         Such as in strange land
         He found in wonderworks of God and Nature's hand.
                                                  --Byron.
   [1913 Webster]