There are 4 15-letter words that start with 'fl'.
| flibbertigibbet | flirtatiousness |
| floriculturists | floriferousness |
Note: These 4 15-letter words that start with 'fl' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with fla, flo, flu, fle, fli, fly.
3-letter words start with 'fl' (2)