14-Letter Words Matching _____M_R______

There are 12 14-letter words that match _____M_R______. 3 are common words, such as AGGLOMERATIONS and COMMEMORATIONS. A rarer one is ULTRAMARATHONS. In this set, S is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 12

agglomerationscommemorationsintermarriageshomeomorphismssophomoricallycommemorativesoverimpressingpaedomorphismspaedomorphosespaedomorphosispolyembryoniesultramarathons

About this list

Words
12 (3 common words)
Common example
agglomerations
Rare example
ultramarathons
Doubled letters
6
Ending in S
10
Most frequent letter
S (12)

Questions

How many 14-letter words matching _____m_r______ are there?

12. 3 of them are common words.

What is a common example?

AGGLOMERATIONS is among the common words in this set.