There are 21 words that end with 'eron'.
heron | operon | aileron |
hyperon | enteron | chaperon |
cheveron | deuteron | dipteron |
erigeron | longeron | flaperon |
vigneron | deceleron | ephemeron |
tierceron | mesenteron | interferon |
archenteron | coelenteron | hymenopteron |
Note: These 21 words that end with 'eron' are found from the USA & Canada version of the tournament Scrabble word list.