There are 23 words that start with 'cubi'.
| cubic | cubit | cubics | 
| cubing | cubism | cubist | 
| cubiti | cubits | cubical | 
| cubicle | cubicly | cubisms | 
| cubists | cubital | cubitus | 
| cubicity | cubicles | cubicula | 
| cubiform | cubistic | cubically | 
| cubiculum | cubicities | |
Note: These 23 words that start with 'cubi' are found from the USA & Canada version of the tournament Scrabble word list.