There are 10 words that start with 'cerat'.
| cerate | cerated | cerates | 
| ceratin | ceratins | ceratoid | 
| ceratodus | ceratoduses | ceratopsian | 
| ceratopsians | ||
Note: These 10 words that start with 'cerat' are found from the USA & Canada version of the tournament Scrabble word list.