There are 2 15-letter words that end with 'ening'.
| overlengthening | restrengthening |
Note: These 2 15-letter words that end with 'ening' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with tening, dening, kening, eening, hening, pening, vening, zening, sening, fening, mening, cening, iening, lening, rening.
7-letter words end with 'ening' (6)