10-Letter Words Matching __M_____M_

There are 13 10-letter words that match __M_____M_. 7 are common words, such as COMMUNISMS and CUMBERSOME. A rarer one is VAMPIRISMS. In this set, S is the most frequent open letter (10 words). 4 words contain a doubled letter.

Full list 13

communismscumbersomegymnasiumsmammogramssummertimesymbolismssymposiumshemachromehemangiomalumpectomycymbidiumsmammonismsvampirisms

About this list

Words
13 (7 common words)
Common example
communisms
Rare example
vampirisms
Doubled letters
4
Ending in S
8
Most frequent letter
S (10)

Questions

How many 10-letter words matching __m_____m_ are there?

13. 7 of them are common words.

What is a common example?

COMMUNISMS is among the common words in this set.