There are 14 8-letter words that start with 'ill'.
| illation | illative | illegals | illinium | 
| illiquid | illogics | illuding | illumine | 
| illuming | illusion | illusive | illusory | 
| illuvial | illuvium | ||
Note: These 14 8-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)