There are 11 words that start with 'demis'.
| demise | demised | 
| demises | demising | 
| demister | demisable | 
| demission | demisters | 
| demissions | demisemiquaver | 
| demisemiquavers | |
Note: These 11 words that start with 'demis' are found from the USA & Canada version of the tournament Scrabble word list.