There are 14 words that start with 'backfi'.
| backfit | backfill | backfire |
| backfits | backfield | backfills |
| backfired | backfires | backfields |
| backfilled | backfiring | backfitted |
| backfilling | backfitting | |
Note: These 14 words that start with 'backfi' are found from the USA & Canada version of the tournament Scrabble word list.