There are 13 words that start with 'exterm'.
| extermine | extermined |
| extermines | exterminate |
| extermining | exterminated |
| exterminates | exterminator |
| exterminating | extermination |
| exterminators | exterminatory |
| exterminations | |
Note: These 13 words that start with 'exterm' are found from the USA & Canada version of the tournament Scrabble word list.