15-Letter Words Matching S_______O______

There are 22 15-letter words that match S_______O______. 2 are common words, such as SUPERFLUOUSNESS and SUPERIMPOSITION. A rarer one is SYNCHRONOUSNESS. In this set, E is the most frequent open letter (20 words). 6 words contain a doubled letter.

Full list 22

superfluousnesssuperimpositionschistosomiasesschistosomiasissententiousnessstereoisomerismsubstratospheresaponaceousnessscintillometerssedimentologiessedimentologistsemipornographysplenectomizingspontaneousnesssporangiophoresstrongyloidosesstrongyloidosissubcategorizingsubdevelopmentssuperabsorbentssupermajoritiessynchronousness

About this list

Words
22 (2 common words)
Common example
superfluousness
Rare example
synchronousness
Doubled letters
6
Ending in S
15
Most frequent letter
E (20)

Questions

How many 15-letter words matching s_______o______ are there?

22. 2 of them are common words.

What is a common example?

SUPERFLUOUSNESS is among the common words in this set.