peripetia vs peripeteia

peripetia and peripeteia both are nouns.

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

As nouns, peripetia and peripeteia are synonyms defined as:

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

Other synonyms of peripetia include peripety.

peripetia (noun)	peripeteia (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)