13-Letter Words Matching M_________A__

There are 14 13-letter words that match M_________A__. 2 are common words, such as MEGALOMANIACS and MISUNDERSTAND. A rarer one is MYELENCEPHALA. In this set, I is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 14

megalomaniacsmisunderstandmajoritariansmelancholiacsmetaphosphatemetropolitansmicrocrystalsmicrohabitatsmicroprogramsmisappraisalsmisarticulatemultimegawattmultinucleatemyelencephala

About this list

Words
14 (2 common words)
Common example
megalomaniacs
Rare example
myelencephala
Doubled letters
2
Ending in S
8
Most frequent letter
I (12)

Questions

How many 13-letter words matching m_________a__ are there?

14. 2 of them are common words.

What is a common example?

MEGALOMANIACS is among the common words in this set.