Orthodox vs Greek Orthodox

Orthodox and Greek Orthodox both are adjectives.

Word	Noun	Adjective	Verb	Adverb
Orthodox	No	Yes	No	No
Greek Orthodox	No	Yes	No	No

As adjectives, Orthodox and Greek Orthodox are synonyms defined as:

Orthodox and Greek Orthodox: of or relating to or characteristic of the Eastern Orthodox Church

Other synonyms of Orthodox include Eastern Orthodox, Russian Orthodox.

Orthodox (adjective)	Greek Orthodox (adjective)
of or pertaining to or characteristic of Judaism	of or relating to or characteristic of the Eastern Orthodox Church
of or relating to or characteristic of the Eastern Orthodox Church