13-Letter Words Matching _____M___C___

There are 12 13-letter words that match _____M___C___. 6 are common words, such as ARITHMETICIAN and CIRCUMSPECTLY. A rarer one is NONNUMERICALS. In this set, I is the most frequent open letter (11 words). 4 words contain a doubled letter.

Full list 12

arithmeticiancircumspectlyexcommunicateincommunicadomathematiciannoncommercialachromaticitymacromoleculeosteomalaciascircumcirclesdeterminaciesnonnumericals

About this list

Words
12 (6 common words)
Common example
arithmetician
Rare example
nonnumericals
Doubled letters
4
Ending in S
4
Most frequent letter
I (11)

Questions

How many 13-letter words matching _____m___c___ are there?

12. 6 of them are common words.

What is a common example?

ARITHMETICIAN is among the common words in this set.