There are 20 words that end with 'ooing'.
| booing | cooing | looing | 
| mooing | pooing | wooing | 
| shooing | tabooing | boohooing | 
| cuckooing | hallooing | hollooing | 
| hoodooing | hullooing | skidooing | 
| tattooing | voodooing | shampooing | 
| skiddooing | ballyhooing | |
Note: These 20 words that end with 'ooing' are found from the USA & Canada version of the tournament Scrabble word list.