There are 14 words that start with 'declar'.
| declare | declared | 
| declarer | declares | 
| declarant | declarers | 
| declaring | declarable | 
| declarants | declaration | 
| declarative | declaratory | 
| declarations | declaratively | 
Note: These 14 words that start with 'declar' are found from the USA & Canada version of the tournament Scrabble word list.