There are 11 words that start with 'irrev'.
| irreverent | irreverence |
| irrevocable | irrevocably |
| irreverences | irreverently |
| irreversible | irreversibly |
| irrevocability | irreversibility |
| irrevocableness | |
Note: These 11 words that start with 'irrev' are found from the USA & Canada version of the tournament Scrabble word list.