There are 14 words that end with 'ntism'.
| giantism | gigantism |
| scientism | tarantism |
| presentism | immanentism |
| irredentism | vigilantism |
| dilettantism | obscurantism |
| sycophantism | flagellantism |
| pococurantism | indifferentism |
Note: These 14 words that end with 'ntism' are found from the USA & Canada version of the tournament Scrabble word list.