15-Letter Words Matching ___S________O__

There are 14 15-letter words that match ___S________O__. 4 are common words, such as CLASSIFICATIONS and PRESSURIZATIONS. A rarer one is TRISOCTAHEDRONS. In this set, I is the most frequent open letter (14 words). 6 words contain a doubled letter.

Full list 14

classificationspressurizationspresuppositionssubstantiationsdissatisfactoryopisthognathouspassifloraceousmissionizationsnonsegregationsnonsimultaneousphysiopathologyplasticizationssensualizationstrisoctahedrons

About this list

Words
14 (4 common words)
Common example
classifications
Rare example
trisoctahedrons
Doubled letters
6
Ending in S
12
Most frequent letter
I (14)

Questions

How many 15-letter words matching ___s________o__ are there?

14. 4 of them are common words.

What is a common example?

CLASSIFICATIONS is among the common words in this set.