There are 12 words that start with 'demar'.
| demark | demarks | demarche |
| demarked | demarcate | demarches |
| demarking | demarcated | demarcates |
| demarcating | demarcation | demarcations |
Note: These 12 words that start with 'demar' are found from the USA & Canada version of the tournament Scrabble word list.