There are 14 words that start with 'megas'.
| megass | megasse |
| megasses | megastar |
| megaspore | megastars |
| megascopic | megaspores |
| megasporic | megasporangia |
| megascopically | megasporangium |
| megasporophyll | megasporophylls |
Note: These 14 words that start with 'megas' are found from the USA & Canada version of the tournament Scrabble word list.