The Collaborative International Dictionary of English v.0.48:

Paganize \Pa"gan*ize\ (p[=a]"gan*[imac]z), v. t. [imp. & p. p.
   Paganized; p. pr. & vb. n. Paganizing.]
   To render pagan or heathenish; to convert to paganism.
   --Hallywell.
   [1913 Webster]