There are 13 words that start with 'flour'.
| flour | flours | 
| floury | floured | 
| flouring | flourish | 
| flourless | flourished | 
| flourisher | flourishes | 
| flourishers | flourishing | 
| flourishingly | |
Note: These 13 words that start with 'flour' are found from the USA & Canada version of the tournament Scrabble word list.