There are 120 9-letter words that end with 'ation'.
Note: These 120 9-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)