HEATHENISM
paganism, pagan religion, heathenism
(noun) any of various religions other than Christianity or Judaism or Islamism
Source: WordNet® 3.1
Etymology
Noun
heathenism (countable and uncountable, plural heathenisms)
paganism, heathendom
Synonym: heathenship
Coordinate terms
Source: Wiktionary
Hea"then*ism, n.
1. The religious system or rites of a heathen nation; idolatry;
paganism.
2. The manners or morals usually prevalent in a heathen country;
ignorance; rudeness; barbarism.
Source: Webster’s Unabridged Dictionary 1913 Edition