There are 13 words that start with 'regal'.
| regal | regale | regaled | 
| regaler | regales | regalia | 
| regally | regalers | regaling | 
| regality | regalness | regalities | 
| regalnesses | ||
Note: These 13 words that start with 'regal' are found from the USA & Canada version of the tournament Scrabble word list.