There are 17 words that start with 'estra'.
| estral | estray |
| estrays | estragon |
| estrange | estrayed |
| estradiol | estragons |
| estranged | estranger |
| estranges | estraying |
| estradiols | estrangers |
| estranging | estrangement |
| estrangements | |
Note: These 17 words that start with 'estra' are found from the USA & Canada version of the tournament Scrabble word list.