medieval mode vs Gregorian mode

medieval mode and Gregorian mode both are nouns.

Word	Noun	Adjective	Verb	Adverb
medieval mode	Yes	No	No	No
Gregorian mode	Yes	No	No	No

As nouns, medieval mode and Gregorian mode are synonyms defined as:

medieval mode and Gregorian mode: any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode

Other synonyms of medieval mode include church mode, ecclesiastical mode.

medieval mode (noun)	Gregorian mode (noun)
any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode	any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode