There are 17 10-letter words that start with 'pet'.
| petalodies | petiolules | petiteness |
| petitioned | petitioner | petnapings |
| petnappers | petnapping | petrifiers |
| petrifying | petroglyph | petrolatum |
| petroleums | petrologic | petticoats |
| petulances | petulantly | |
Note: These 17 10-letter words that start with 'pet' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with petr, pett, peta, peti, petu, petn, pete, pets, petc.
4-letter words start with 'pet' (1)