15-Letter Words Matching S__O___________

There are 12 15-letter words that match S__O___________. 1 are common words, such as SADOMASOCHISTIC and SAPONIFICATIONS. A rarer one is SUBORGANIZATION. In this set, I is the most frequent open letter (11 words). 5 words contain a doubled letter.

Full list 12

sadomasochisticsaponificationssycophanticallysaponaceousnessschoolmasterishsecondarinessesseroconversionsstrongyloidosesstrongyloidosissuboptimizationsubordinatenesssuborganization

About this list

Words
12 (1 common words)
Common example
sadomasochistic
Rare example
suborganization
Doubled letters
5
Ending in S
7
Most frequent letter
I (11)

Questions

How many 15-letter words matching s__o___________ are there?

12. 1 of them are common words.

What is a common example?

SADOMASOCHISTIC is among the common words in this set.