There are 15 13-letter words that end with 'tisms'.
Note: These 15 13-letter words that end with 'tisms' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with atisms, otisms, etisms, ntisms, itisms, utisms, ptisms, ttisms, ytisms, ftisms, htisms, ltisms, rtisms, stisms.
7-letter words end with 'tisms' (2)