Greek-to-English irregular loan plural

A Greek plural is a plural formed according to the rules of Ancient Greek. These are also found in English. Some of these are also technically Latin plurals as they are forms originally loaned from Greek into Latin.

Ending	Change	Examples
-is	-es	analysis - analyses axis-axes basis-bases crisis-crises diagnosis-diagnoses ellipsis-ellipses genesis - geneses hypothesis-hypotheses oasis-oases paralysis-paralyses parenthesis-parentheses synopsis-synopses synthesis-syntheses thesis, theses.
-on	-a	automaton- automata criterion - criteria ganglion- ganglia mitochondrion - mitochondria phenomenon - phenomena
-ma	-mata	dogma-dogmata stigma-stigmata stoma-stomata etc.