Unbeliever

from WordNet (r) 3.0 (2006)

unbeliever
    n 1: someone who refuses to believe (as in a divinity) [syn:
         {disbeliever}, {nonbeliever}, {unbeliever}]

from The Collaborative International Dictionary of English v.0.48

Unbeliever \Un`be*liev"er\, n.
   1. One who does not believe; an incredulous person; a
      doubter; a skeptic.
      [1913 Webster]

   2. A disbeliever; especially, one who does not believe that
      the Bible is a divine revelation, and holds that Christ
      was neither a divine nor a supernatural person; an
      infidel; a freethinker.
      [1913 Webster]

   Syn: See {Infidel}.
        [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

38 Moby Thesaurus words for "unbeliever":
      Pyrrhonist, Sabbath-breaker, apostate, atheist, backslider,
      blasphemer, deserter, disbeliever, doubter, doubting Thomas,
      gentile, giaour, goy, heathen, infidel, kaffir, minimifidian,
      non-Christian, non-Jew, non-Mohammedan, non-Mormon, non-Moslem,
      non-Muhammadan, non-Muslim, nonbeliever, nullifidian, pagan,
      recidivist, recreant, renegade, sacrilegist, secularist, shegets,
      shiksa, zendician, zendik, zendikite, zetetic

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