There are 9 10-letter words that start with 'fel'.
| feldschers | felicitate | felicities | 
| felicitous | felinities | fellations | 
| fellmonger | fellnesses | fellowship | 
Note: These 9 10-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)