There are 12 words that start with 'hyperi'.
| hyperimmune | hyperintense |
| hyperimmunize | hyperinflated |
| hyperimmunized | hyperimmunizes |
| hyperinflation | hyperirritable |
| hyperimmunizing | hyperinflations |
| hyperinsulinism | hyperinvolution |
Note: These 12 words that start with 'hyperi' are found from the USA & Canada version of the tournament Scrabble word list.