ending vs peroration

ending and peroration both are nouns.

Word	Noun	Adjective	Verb	Adverb
ending	Yes	No	No	No
peroration	Yes	No	No	No

As nouns, peroration is a hyponym of ending; that is, peroration is a word with a more specific, narrower meaning than ending:

Other hyponyms of ending include anticlimax, bathos, epilog, epilogue, epilog, epilogue, coda, finale.

ending (noun)	peroration (noun)
the act of ending something	(rhetoric) the concluding section of an oration
the end of a word (a suffix or inflectional ending or final morpheme)	a flowery and highly rhetorical oration
the last section of a communication
event whose occurrence ends something
the point in time at which something ends