There are 12 words that start with 'ferme'.
| ferment | ferments | 
| fermented | fermenter | 
| fermentor | fermenters | 
| fermenting | fermentors | 
| fermentable | fermentation | 
| fermentative | fermentations | 
Note: These 12 words that start with 'ferme' are found from the USA & Canada version of the tournament Scrabble word list.