There are 15 words that start with 'retu'.
| retune | return | retuse |
| retuned | retunes | returns |
| retuning | returned | returnee |
| returner | returnees | returners |
| returning | returnable | returnables |
Note: These 15 words that start with 'retu' are found from the USA & Canada version of the tournament Scrabble word list.