There are 19 words that start with 'foi'.
| foil | foin | foils | foins |
| foist | foible | foiled | foined |
| foison | foists | foibles | foiling |
| foining | foisons | foisted | foilable |
| foilsman | foilsmen | foisting | |
Note: These 19 words that start with 'foi' are found from the USA & Canada version of the tournament Scrabble word list.