13-Letter Words Matching ____S__M_____

There are 18 13-letter words that match ____S__M_____. 4 are common words, such as ANTISUBMARINE and DISASSEMBLING. A rarer one is WELTSCHMERZES. In this set, A is the most frequent open letter (16 words). 9 words contain a doubled letter.

Full list 18

antisubmarinedisassemblingguesstimatingoverstimulateantisymmetricdisassembliesmonosymmetricaccustomationmisassemblingmisassumptionmisestimatingmisestimationresystematizesubassembliestranshumancestransmembraneuncustomarilyweltschmerzes

About this list

Words
18 (4 common words)
Common example
antisubmarine
Rare example
weltschmerzes
Doubled letters
9
Ending in S
4
Most frequent letter
A (16)

Questions

How many 13-letter words matching ____s__m_____ are there?

18. 4 of them are common words.

What is a common example?

ANTISUBMARINE is among the common words in this set.