There are 9 words that start with 'illo'.
| illogic | illogics |
| illogical | illogically |
| illogicality | illocutionary |
| illogicalness | illogicalities |
| illogicalnesses | |
Note: These 9 words that start with 'illo' are found from the USA & Canada version of the tournament Scrabble word list.