There are 16 words that start with 'pinna'.
| pinna | pinnae | pinnal |
| pinnas | pinnace | pinnate |
| pinnaces | pinnacle | pinnated |
| pinnacled | pinnacles | pinnately |
| pinnation | pinnacling | pinnatifid |
| pinnations | ||
Note: These 16 words that start with 'pinna' are found from the USA & Canada version of the tournament Scrabble word list.