There are 19 words that start with 'keto'.
| keto | ketol | ketols |
| ketone | ketose | ketones |
| ketonic | ketoses | ketosis |
| ketotic | ketogenic | ketonemia |
| ketonuria | ketonemias | ketonurias |
| ketogeneses | ketogenesis | ketosteroid |
| ketosteroids | ||
Note: These 19 words that start with 'keto' are found from the USA & Canada version of the tournament Scrabble word list.