There are 3 15-letter words that start with 'mega'.
| megacorporation | megagametophyte |
| megasporophylls | |
Note: These 3 15-letter words that start with 'mega' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with megal, megap, megas, megab, megad, megaf, megat, megac, megah, megav, megag, megak, megar, megaw.
6-letter words start with 'mega' (2)