There are 6 14-letter words that start with 'ef'.
| effectualities | effervescences |
| effervescently | efflorescences |
| effortlessness | effusivenesses |
Note: These 6 14-letter words that start with 'ef' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with eff, eft, efs.
3-letter words start with 'ef' (3)