There are 18 words that start with 'ferri'.
| ferric | ferried |
| ferries | ferrite |
| ferriage | ferrites |
| ferritic | ferritin |
| ferriages | ferritins |
| ferriferous | ferrimagnet |
| ferricyanide | ferrimagnets |
| ferricyanides | ferrimagnetic |
| ferrimagnetism | ferrimagnetisms |
Note: These 18 words that start with 'ferri' are found from the USA & Canada version of the tournament Scrabble word list.