15-Letter Words Matching ____M_N________

There are 20 15-letter words that match ____M_N________. 5 are common words, such as ACRIMONIOUSNESS and ARGUMENTATIVELY. A rarer one is SEDIMENTOLOGIST. In this set, I is the most frequent open letter (20 words). 5 words contain a doubled letter.

Full list 20

acrimoniousnessargumentativelyceremoniousnessdehumanizationsundemonstrativeignominiousnessmonumentalizingpneumonectomiesantimanagementsantimonarchicalantimonarchistsantimonopolistsbituminizationsdefeminizationsdocumentationalfragmentarinessmonumentalitiesrudimentarinesssedimentologiessedimentologist

About this list

Words
20 (5 common words)
Common example
acrimoniousness
Rare example
sedimentologist
Doubled letters
5
Ending in S
14
Most frequent letter
I (20)

Questions

How many 15-letter words matching ____m_n________ are there?

20. 5 of them are common words.

What is a common example?

ACRIMONIOUSNESS is among the common words in this set.