noun (n)

• any of various religions other than Christianity or Judaism or Islamism(noun.cognition)

  Synonym:
  heathenism, pagan religion
  

  source: wordnet30
• The state of being pagan; pagan characteristics; esp., the worship of idols or false gods, or the system of religious opinions and worship maintained by pagans; heathenism.(noun)

  source: webster1913