There are 18 words that start with 'fault'.
| fault | faults | 
| faulty | faulted | 
| faultier | faultily | 
| faulting | faultiest | 
| faultless | faultiness | 
| faultfinder | faultlessly | 
| faultfinders | faultfinding | 
| faultinesses | faultfindings | 
| faultlessness | faultlessnesses | 
Note: These 18 words that start with 'fault' are found from the USA & Canada version of the tournament Scrabble word list.