There are 11 15-letter words that end with 'nisms'.
| abstractionisms | antiquarianisms |
| associationisms | egalitarianisms |
| millenarianisms | libertarianisms |
| obstructionisms | servomechanisms |
| restrictionisms | ultramontanisms |
| utilitarianisms | |
Note: These 11 15-letter words that end with 'nisms' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with onisms, anisms, inisms, enisms, rnisms, unisms, gnisms.
7-letter words end with 'nisms' (3)