There are 11 words that start with 'nontr'.
| nontrump | nontruth |
| nontragic | nontribal |
| nontruths | nontrivial |
| nontropical | nontreatment |
| nontreatments | nontraditional |
| nontransferable | |
Note: These 11 words that start with 'nontr' are found from the USA & Canada version of the tournament Scrabble word list.