There are 10 words that start with 'ceas'.
| cease | ceased | 
| ceases | ceasing | 
| ceasefire | ceaseless | 
| ceasefires | ceaselessly | 
| ceaselessness | ceaselessnesses | 
Note: These 10 words that start with 'ceas' are found from the USA & Canada version of the tournament Scrabble word list.