There are 7 6-letter words that start with 'ef'.
| efface | effect | effete | effigy | efflux |
| effort | effuse | |||
Note: These 7 6-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)