There are 15 words that start with 'flint'.
| flint | flints | flinty | 
| flinted | flintier | flintily | 
| flinting | flinthead | flintiest | 
| flintlike | flintlock | flintheads | 
| flintiness | flintlocks | flintinesses | 
Note: These 15 words that start with 'flint' are found from the USA & Canada version of the tournament Scrabble word list.