There are 14 words that start with 'false'.
| false | falser | falsely | 
| falsest | falsetto | falseface | 
| falsehood | falseness | falsettos | 
| falsework | falsefaces | falsehoods | 
| falseworks | falsenesses | |
Note: These 14 words that start with 'false' are found from the USA & Canada version of the tournament Scrabble word list.