14-Letter Words Matching ____S__O______

There are 14 14-letter words that match ____S__O______. 5 are common words, such as CLAUSTROPHOBIA and CLAUSTROPHOBIC. A rarer one is ROBUSTIOUSNESS. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 14

claustrophobiaclaustrophobichomeschoolingsincestuousnesspraiseworthiercounselorshipsparasitologistpraiseworthilytransitorinesscatastrophismscatastrophistsclaustrophobesparasitologiesrobustiousness

About this list

Words
14 (5 common words)
Common example
claustrophobia
Rare example
robustiousness
Doubled letters
4
Ending in S
9
Most frequent letter
I (13)

Questions

How many 14-letter words matching ____s__o______ are there?

14. 5 of them are common words.

What is a common example?

CLAUSTROPHOBIA is among the common words in this set.