There are 12 words that start with 'elli'.
| ellipse | ellipses | 
| ellipsis | elliptic | 
| ellipsoid | ellipsoids | 
| elliptical | ellipsoidal | 
| ellipticals | ellipticity | 
| elliptically | ellipticities | 
Note: These 12 words that start with 'elli' are found from the USA & Canada version of the tournament Scrabble word list.