There are 15 words that start with 'progno'.
| prognose | prognosed |
| prognoses | prognosis |
| prognosing | prognostic |
| prognostics | prognosticate |
| prognosticated | prognosticates |
| prognosticator | prognosticating |
| prognostication | prognosticative |
| prognosticators | |
Note: These 15 words that start with 'progno' are found from the USA & Canada version of the tournament Scrabble word list.