There are 11 words that start with 'reag'.
| reagin | reagent |
| reagins | reagents |
| reaginic | reaggregate |
| reaggregated | reaggregates |
| reaggregating | reaggregation |
| reaggregations | |
Note: These 11 words that start with 'reag' are found from the USA & Canada version of the tournament Scrabble word list.