peripety vs peripetia

peripety and peripetia both are nouns.

Word	Noun	Adjective	Verb	Adverb
peripety	Yes	No	No	No
peripetia	Yes	No	No	No

As nouns, peripety and peripetia are synonyms defined as:

peripety and peripetia: a sudden and unexpected change of fortune or reverse of circumstances (especially in a literary work)

Other synonyms of peripety include peripeteia.

peripety (noun)	peripetia (noun)
a sudden and unexpected change of fortune or reverse of circumstances (especially in a literary work)	a sudden and unexpected change of fortune or reverse of circumstances (especially in a literary work)