There are 16 12-letter words that end with 'der'.
Note: These 16 12-letter words that end with 'der' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with nder, lder, ader, ider, dder, rder, eder, uder, oder, wder, yder.
5-letter words end with 'der' (26)