Catharism vs Christian religion

Catharism and Christian religion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Catharism	Yes	No	No	No
Christian religion	Yes	No	No	No

As nouns, Christian religion is a hypernym of Catharism; that is, Christian religion is a word with a broader meaning than Catharism:

Catharism: a Christian movement considered to be a medieval descendant of Manichaeism in southern France in the 12th and 13th centuries; characterized by dualism (asserted the coexistence of two mutually opposed principles, one good and one evil); was exterminated for heresy during the Inquisition
Christian religion: a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior

Other hypernyms of Catharism include heresy, unorthodoxy, Christianity.

Catharism (noun)	Christian religion (noun)
a Christian movement considered to be a medieval descendant of Manichaeism in southern France in the 12th and 13th centuries; characterized by dualism (asserted the coexistence of two mutually opposed principles, one good and one evil); was exterminated for heresy during the Inquisition	a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior