There are 14 words that end with 'ntisms'.
| giantisms | gigantisms |
| scientisms | tarantisms |
| presentisms | immanentisms |
| irredentisms | vigilantisms |
| dilettantisms | obscurantisms |
| sycophantisms | flagellantisms |
| pococurantisms | indifferentisms |
Note: These 14 words that end with 'ntisms' are found from the USA & Canada version of the tournament Scrabble word list.