There are 15 words that start with 'prefor'.
| preform | preforms |
| preformat | preformed |
| preformats | preforming |
| preformation | preformatted |
| preformulate | preformations |
| preformatting | preformulated |
| preformulates | preformulating |
| preformationist | |
Note: These 15 words that start with 'prefor' are found from the USA & Canada version of the tournament Scrabble word list.