There are 11 words that start with 'stomat'.
| stomata | stomate | stomatal | 
| stomates | stomatic | stomatous | 
| stomatitis | stomatopod | stomatopods | 
| stomatitides | stomatitises | |
Note: These 11 words that start with 'stomat' are found from the USA & Canada version of the tournament Scrabble word list.