The Collaborative International Dictionary of English v.0.48:

Deist \De"ist\ (d[=e]"[i^]st), n. [L. deus god: cf. F.
   d['e]iste. See Deity.]
   One who believes in the existence of a God, but denies
   revealed religion; a freethinker.
   [1913 Webster]

   Note: A deist, as denying a revelation, is opposed to a
         Christian; as, opposed to the denier of a God, whether
         atheist or pantheist, a deist is generally
         denominated theist. --Latham.

   Syn: See Infidel. Deistic

WordNet (r) 3.0 (2006):

deist
    adj 1: of or relating to deism [syn: deist, deistic]
    n 1: a person who believes that God created the universe and
         then abandoned it [syn: deist, freethinker]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "deist":
   allotheist, anthropolater, anthropotheist, autotheist, cosmotheist,
   ditheist, dualist, henotheist, hylotheist, monotheist, multitheist,
   myriotheist, pantheist, physitheist, polytheist, psychotheist,
   tetratheist, theist, theriotheist, tritheist, zootheist