episcopacy vs episcopate

episcopacy and episcopate both are nouns.

Word	Noun	Adjective	Verb	Adverb
episcopacy	Yes	No	No	No
episcopate	Yes	No	No	No

As nouns, episcopacy and episcopate are synonyms defined as:

episcopacy (noun)	episcopate (noun)
the collective body of bishops	the office and dignity of a bishop
	the collective body of bishops
	the territorial jurisdiction of a bishop
	the term of office of a bishop