11-Letter Words Matching ___S_____M_

There are 23 11-letter words that match ___S_____M_. 5 are common words, such as CLASSICISMS and CONSORTIUMS. A rarer one is SEISMOGRAMS. In this set, S is the most frequent open letter (20 words). 7 words contain a doubled letter.

Full list 23

classicismsconsortiumsphysiognomyprosceniumssubstratumsblastodermsbolshevismsglossectomyplasmodiumsprestissimoprosenchymasensualismswhiskbroomsboosterismsgnosticismshipsterismsmessianismsplasmalemmaplasmodesmaplasmodesmspresentismsprostatismsseismograms

About this list

Words
23 (5 common words)
Common example
classicisms
Rare example
seismograms
Doubled letters
7
Ending in S
17
Most frequent letter
S (20)

Questions

How many 11-letter words matching ___s_____m_ are there?

23. 5 of them are common words.

What is a common example?

CLASSICISMS is among the common words in this set.