There are 14 words that start with 'pinw'.
| pinwale | pinweed | pinwork | 
| pinworm | pinwales | pinweeds | 
| pinwheel | pinworks | pinworms | 
| pinwheels | pinwrench | pinwheeled | 
| pinwheeling | pinwrenches | |
Note: These 14 words that start with 'pinw' are found from the USA & Canada version of the tournament Scrabble word list.