There are 16 words that start with 'regis'.
| register | registry |
| regisseur | registers |
| registrar | regisseurs |
| registered | registrant |
| registrars | registries |
| registering | registrable |
| registrants | registerable |
| registration | registrations |
Note: These 16 words that start with 'regis' are found from the USA & Canada version of the tournament Scrabble word list.