There are 12 words that end with 'trator'.
| nitrator | titrator | 
| castrator | arbitrator | 
| illustrator | infiltrator | 
| perpetrator | demonstrator | 
| concentrator | orchestrator | 
| remonstrator | administrator | 
Note: These 12 words that end with 'trator' are found from the USA & Canada version of the tournament Scrabble word list.