There are 4 8-letter words that start with 'irr'.
| irrigate | irritant | irritate | irrupted |
Note: These 4 8-letter words that start with 'irr' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with irre, irri, irra, irru, irro.
6-letter words start with 'irr' (2)