There are 2 15-letter words that end with 'ials'.
| semicentennials | quincentennials |
Note: These 2 15-letter words that end with 'ials' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with rials, nials, tials, cials, dials, mials, bials, pials, vials, hials, sials, uials.
5-letter words end with 'ials' (4)