Orthodox Catholic Church vs Orthodox Church

Orthodox Catholic Church and Orthodox Church both are nouns.

Word	Noun	Adjective	Verb	Adverb
Orthodox Catholic Church	Yes	No	No	No
Orthodox Church	Yes	No	No	No

As nouns, Orthodox Catholic Church and Orthodox Church are synonyms defined as:

Orthodox Catholic Church and Orthodox Church: derived from the Byzantine Church and adhering to Byzantine rites

Other synonyms of Orthodox Catholic Church include Eastern Church, Eastern Orthodox, Eastern Orthodox Church.

Orthodox Catholic Church (noun)	Orthodox Church (noun)
derived from the Byzantine Church and adhering to Byzantine rites	derived from the Byzantine Church and adhering to Byzantine rites