There are 11 words that start with 'capitu'.
| capitula | capitular | 
| capitulum | capitulary | 
| capitulate | capitulated | 
| capitulates | capitularies | 
| capitulating | capitulation | 
| capitulations | |
Note: These 11 words that start with 'capitu' are found from the USA & Canada version of the tournament Scrabble word list.