We don't have synonyms for peripeteia yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are peripetia and peripeteias.
(n) :
a reversal of fortune; a sudden change in circumstances
"1965: Once more I was a man in a myth, incapable of understanding it, but somehow aware that understanding it meant it must continue, however sinister its peripeteia. -- John Fowles, The Magus"
(n) :
a reversal of fortune; a sudden change in circumstances
"1965: Once more I was a man in a myth, incapable of understanding it, but somehow aware that understanding it meant it must continue, however sinister its peripeteia. -- John Fowles, The Magus"