12-Letter Words Matching __M________R

There are 13 12-letter words that match __M________R. 5 are common words, such as COMMEMORATOR and COMMISSIONER. A rarer one is SEMIDIAMETER. In this set, E is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 13

commemoratorcommissionercommunicatordemonstratorsemicircularcommiseratordemagnetizerhomeschoolerremembrancerremonstratordemocratizerimmortalizersemidiameter

About this list

Words
13 (5 common words)
Common example
commemorator
Rare example
semidiameter
Doubled letters
6
Ending in S
0
Most frequent letter
E (12)

Questions

How many 12-letter words matching __m________r are there?

13. 5 of them are common words.

What is a common example?

COMMEMORATOR is among the common words in this set.