There are 15 9-letter words that start with 'ill'.
| illations | illatives | illegally |
| illegible | illegibly | illiberal |
| illicitly | illiniums | illnesses |
| illogical | illumined | illumines |
| illusions | illuviate | illuviums |
Note: These 15 9-letter words that start with 'ill' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with illu, illi, ille, illo, illa, illn, ills, illy.
4-letter words start with 'ill' (2)