There are 21 words that start with 'pira'.
| piracy | pirana | pirate |
| piraya | piragua | piranas |
| piranha | pirated | pirates |
| piratic | pirayas | piracies |
| piraguas | piranhas | pirarucu |
| pirating | piracetam | pirarucus |
| piratical | piracetams | piratically |
Note: These 21 words that start with 'pira' are found from the USA & Canada version of the tournament Scrabble word list.