Nonbeliever Synonyms

nŏnbĕ-lēvər
One who habitually or instinctively doubts or questions
(Noun)
Synonyms:
  1. doubter
  2. unbeliever
  3. skeptic
  4. agnostic
  5. doubting thomas
  6. atheist
  7. disbeliever
  8. heathen
  9. infidel
  10. pagan