There are 10 words that end with 'irming'.
| firming | chirming | 
| affirming | infirming | 
| squirming | confirming | 
| reaffirming | disaffirming | 
| reconfirming | disconfirming | 
Note: These 10 words that end with 'irming' are found from the USA & Canada version of the tournament Scrabble word list.