There are 12 13-letter words that end with 'tering'.
| administering | antilittering |
| helicoptering | enregistering |
| mouthwatering | filibustering |
| outglittering | overmastering |
| overwintering | rencountering |
| reregistering | subclustering |
Note: These 12 13-letter words that end with 'tering' are found from the USA & Canada version of the tournament Scrabble word list.