plagal cadence vs amen cadence

plagal cadence and amen cadence both are nouns.

Word	Noun	Adjective	Verb	Adverb
plagal cadence	Yes	No	No	No
amen cadence	Yes	No	No	No

As nouns, plagal cadence and amen cadence are synonyms defined as:

plagal cadence and amen cadence: a cadence (frequently ending church music) in which the chord of the subdominant precedes the chord of the tonic

plagal cadence (noun)	amen cadence (noun)
a cadence (frequently ending church music) in which the chord of the subdominant precedes the chord of the tonic	a cadence (frequently ending church music) in which the chord of the subdominant precedes the chord of the tonic