12-Letter Words Matching _____M____A_

There are 17 12-letter words that match _____M____A_. 6 are common words, such as ARITHMETICAL and EXTRAMARITAL. A rarer one is SCHISMATICAL. In this set, I is the most frequent open letter (15 words). 5 words contain a doubled letter.

Full list 17

arithmeticalextramaritalmathematicalnoncommittalnonnumericalsystematicalchaulmoograsemblematicalphlegmaticaltauromachianuncommercialextramusicalhydromedusaehypermnesiaspostimperialsaltimboccasschismatical

About this list

Words
17 (6 common words)
Common example
arithmetical
Rare example
schismatical
Doubled letters
5
Ending in S
3
Most frequent letter
I (15)

Questions

How many 12-letter words matching _____m____a_ are there?

17. 6 of them are common words.

What is a common example?

ARITHMETICAL is among the common words in this set.