There are 19 words that start with 'peti'.
| petit | petite | petiole |
| petites | petiolar | petioled |
| petioles | petition | petiolate |
| petiolule | petitions | petiolules |
| petiteness | petitioned | petitioner |
| petitionary | petitioners | petitioning |
| petitenesses | ||
Note: These 19 words that start with 'peti' are found from the USA & Canada version of the tournament Scrabble word list.