There are 11 words that start with 'irred'.
| irredenta | irredentas |
| irredentism | irredentist |
| irreducible | irreducibly |
| irredeemable | irredeemably |
| irredentisms | irredentists |
| irreducibility | |
Note: These 11 words that start with 'irred' are found from the USA & Canada version of the tournament Scrabble word list.