There are 9 13-letter words that end with 'omy'.
| adrenalectomy | chemotaxonomy |
| mastoidectomy | pneumonectomy |
| postvasectomy | prostatectomy |
| sympathectomy | thyroidectomy |
| tonsillectomy | |
Note: These 9 13-letter words that end with 'omy' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with tomy, nomy, oomy, somy, romy, domy, homy.
4-letter words end with 'omy' (1)