There are 13 14-letter words that start with 'il'.
| illegalization | illegibilities |
| illegitimacies | illegitimately |
| illiberalities | illimitability |
| illiterateness | illogicalities |
| illuminatingly | illusivenesses |
| illusorinesses | illustrational |
| illustratively | |
Note: These 13 14-letter words that start with 'il' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ill, ile, ili, ilk, ilm.
3-letter words start with 'il' (2)