There are 6 12-letter words that start with 'fel'.
| felicitating | felicitation | felicitators | 
| felicitously | fellmongered | fellowshiped | 
Note: These 6 12-letter words that start with 'fel' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with fell, feli, felo, fels, feld, felt, fela, felu, felw.
4-letter words start with 'fel' (2)