There are 15 words that end with 'orator'.
| orator | decorator | 
| perorator | corporator | 
| meliorator | evaporator | 
| perforator | ameliorator | 
| invigorator | redecorator | 
| collaborator | commemorator | 
| corroborator | incorporator | 
| reinvigorator | |
Note: These 15 words that end with 'orator' are found from the USA & Canada version of the tournament Scrabble word list.