There are 6 13-letter words that start with 'mega'.
| megakaryocyte | megaloblastic |
| megalomaniacs | megalopolises |
| megalopolitan | megasporangia |
Note: These 6 13-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)