9-Letter Words Matching ___S___M_

There are 17 9-letter words that match ___S___M_. 5 are common words, such as ANGSTROMS and BLASPHEME. A rarer one is ZOOSPERMS. In this set, S is the most frequent open letter (12 words). 4 words contain a doubled letter.

Full list 17

angstromsblasphemeblasphemycapsicumsnewsroomsanisogamyclassismscrossarmsdiestrumsflashlampgypsydomsgypsyismsoutschemeplastrumsprosaismsseismismszoosperms

About this list

Words
17 (5 common words)
Common example
angstroms
Rare example
zoosperms
Doubled letters
4
Ending in S
12
Most frequent letter
S (12)

Questions

How many 9-letter words matching ___s___m_ are there?

17. 5 of them are common words.

What is a common example?

ANGSTROMS is among the common words in this set.