There are 12 words that start with 'petu'.
| petunia | petulant | petunias |
| petuntse | petuntze | petulance |
| petulancy | petuntses | petuntzes |
| petulances | petulantly | petulancies |
Note: These 12 words that start with 'petu' are found from the USA & Canada version of the tournament Scrabble word list.