15-Letter Words Matching ___S__O________

There are 19 15-letter words that match ___S__O________. 3 are common words, such as CONSCIOUSNESSES and PHOSPHORESCENCE. A rarer one is PROSTHODONTISTS. In this set, I is the most frequent open letter (17 words). 6 words contain a doubled letter.

Full list 19

consciousnessesphosphorescencetrustworthinessopisthognathousphosphocreatinephosphoproteinsphosphorylationphysicochemicalquestionabilityboustrophedoniccrashworthinessdiastrophicallygeostrophicallymonstrousnessesnonsaponifiablephosphorylatingphosphorylativeprosopographiesprosthodontists

About this list

Words
19 (3 common words)
Common example
consciousnesses
Rare example
prosthodontists
Doubled letters
6
Ending in S
8
Most frequent letter
I (17)

Questions

How many 15-letter words matching ___s__o________ are there?

19. 3 of them are common words.

What is a common example?

CONSCIOUSNESSES is among the common words in this set.