There are 11 13-letter words that end with 'ifying'.
| declassifying | dehumidifying |
| disqualifying | complexifying |
| saccharifying | reclassifying |
| prequalifying | presignifying |
| prespecifying | reidentifying |
| resolidifying | |
Note: These 11 13-letter words that end with 'ifying' are found from the USA & Canada version of the tournament Scrabble word list.