There are 12 words that start with 'mening'.
| meninges | meningeal | 
| meningioma | meningitic | 
| meningitis | meningiomas | 
| meningiomata | meningitides | 
| meningococci | meningococcal | 
| meningococcic | meningococcus | 
Note: These 12 words that start with 'mening' are found from the USA & Canada version of the tournament Scrabble word list.