There are 13 words that start with 'ceru'.
| ceruse | cerumen | 
| ceruses | cerulean | 
| cerumens | cerusite | 
| ceruleans | cerusites | 
| cerussite | ceruminous | 
| cerussites | ceruloplasmin | 
| ceruloplasmins | |
Note: These 13 words that start with 'ceru' are found from the USA & Canada version of the tournament Scrabble word list.