There are 54 8-letter words that end with 'ation'.
Note: These 54 8-letter words that end with 'ation' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with zation, cation, lation, tation, ration, nation, iation, gation, mation, vation, dation, uation, sation, pation, xation, bation, eation, kation, fation.
6-letter words end with 'ation' (4)