The Collaborative International Dictionary
Gentilism
Gentilism \Gen"til*ism\, n. [Cf. F. gentilisme.]
Hethenism; paganism; the worship of false gods.
Tribal feeling; devotion to one's gens.
Wiktionary
gentilism
n. 1 heathenism; paganism; the worship of false gods 2 tribal feeling; devotion to one's gens