There are 13 words that start with 'prepon'.
| preponderant | preponderate |
| preponderance | preponderancy |
| preponderated | preponderates |
| preponderances | preponderantly |
| preponderately | preponderating |
| preponderation | preponderancies |
| preponderations | |
Note: These 13 words that start with 'prepon' are found from the USA & Canada version of the tournament Scrabble word list.