There are 9 words that start with 'semitr'.
| semitruck | semitropic |
| semitrucks | semitrailer |
| semitropics | semitrailers |
| semitropical | semitranslucent |
| semitransparent | |
Note: These 9 words that start with 'semitr' are found from the USA & Canada version of the tournament Scrabble word list.