Source : Webster's Revised Unabridged Dictionary (1913)

Theologizer \The*ol"o*gi`zer\, n.
   One who theologizes; a theologian. [R.] --Boyle.

Source : WordNet®

theologizer
     n : someone who is learned in theology or who speculates about
         theology (especially Christian theology) [syn: {theologian},
          {theologist}, {theologiser}]