There are 8 15-letter words that start with 'exte'.
| extemporisation | extemporization | 
| extendabilities | extensibilities | 
| extensivenesses | exteriorization | 
| externalisation | externalization | 
Note: These 8 15-letter words that start with 'exte' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with exter, exten, extem.
6-letter words start with 'exte' (3)