cultist

cultist
    n 1: a member of a religious cult
    2: a member of an unorthodox cult who generally lives outside of
       conventional society under the direction of a charismatic
       leader
    

26 Moby Thesaurus words for "cultist":
      Christian, Christianlike, Christianly, adoring, believer,
      believing, cultish, cultistic, devoted, devout, dutiful, faithful,
      ist, pietistic, pious, prayerful, religioner, religionist,
      religious, reverent, reverential, solemn, theistic, venerational,
      venerative, worshipful