There are 12 words that start with 'demand'.
| demand | demands | 
| demanded | demander | 
| demandant | demanders | 
| demanding | demandable | 
| demandants | demandingly | 
| demandingness | demandingnesses | 
Note: These 12 words that start with 'demand' are found from the USA & Canada version of the tournament Scrabble word list.