There are 13 words that end with 'roning'.
| droning | ironing | aproning | 
| throning | dethroning | enthroning | 
| environing | inthroning | unthroning | 
| chaperoning | gridironing | squadroning | 
| reenthroning | ||
Note: These 13 words that end with 'roning' are found from the USA & Canada version of the tournament Scrabble word list.