There are 12 words that start with 'fanf'.
| fanfic | fanfare | fanfics | 
| fanfold | fanfares | fanfaron | 
| fanfolds | fanfarons | fanfolded | 
| fanfolding | fanfaronade | fanfaronades | 
Note: These 12 words that start with 'fanf' are found from the USA & Canada version of the tournament Scrabble word list.