There are 16 words that start with 'coagu'.
| coagula | coagulum |
| coagulant | coagulase |
| coagulate | coagulums |
| coagulable | coagulants |
| coagulases | coagulated |
| coagulates | coagulating |
| coagulation | coagulations |
| coagulability | coagulabilities |
Note: These 16 words that start with 'coagu' are found from the USA & Canada version of the tournament Scrabble word list.