There are 17 words that start with 'effu'.
| effuse | effulge |
| effused | effuses |
| effulged | effulges |
| effusing | effusion |
| effusive | effulgent |
| effulging | effusions |
| effulgence | effusively |
| effulgences | effusiveness |
| effusivenesses | |
Note: These 17 words that start with 'effu' are found from the USA & Canada version of the tournament Scrabble word list.