sermonizer

from WordNet (r) 3.0 (2006)

sermonizer
    n 1: someone whose occupation is preaching the gospel [syn:
         {preacher}, {preacher man}, {sermonizer}, {sermoniser}]

from The Collaborative International Dictionary of English v.0.48

Sermonizer \Ser"mon*i`zer\, n.
   One who sermonizes.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

26 Moby Thesaurus words for "sermonizer":
      Boanerges, chalk talker, churchman, circuit rider, cleric, clerk,
      discourser, divine, ecclesiastic, expositor, expounder, homilist,
      lecturer, minister, parson, praelector, preacher, preaching friar,
      predicant, predikant, pulpitarian, pulpiteer, pulpiter, reader,
      sermoner, sermonist