There are 9 13-letter words that start with 'ill'.
| illiberalisms | illiberalness |
| illiquidities | illocutionary |
| illogicalness | illuminations |
| illusionistic | illustrations |
| illustriously | |
Note: These 9 13-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)