There are 15 words that start with 'clavi'.
| clavi | clavier | 
| clavicle | claviers | 
| clavicles | clavicorn | 
| claviform | clavichord | 
| clavicular | clavierist | 
| clavichords | clavierists | 
| clavieristic | clavichordist | 
| clavichordists | |
Note: These 15 words that start with 'clavi' are found from the USA & Canada version of the tournament Scrabble word list.