14-Letter Words Matching ___S_E________

There are 20 14-letter words that match ___S_E________. 6 are common words, such as BOISTEROUSNESS and CONSTELLATIONS. A rarer one is SUBSPECIALTIES. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 20

boisterousnessconstellationsconsternationsexistentialismexistentialistnonspecialistsconsuetudinaryepistemologiesepistemologistexasperatinglyunostentatiousdiastereomericnonspectacularnonspeculativepresterilizingprosperousnesssubspecialistssubspecializedsubspecializessubspecialties

About this list

Words
20 (6 common words)
Common example
boisterousness
Rare example
subspecialties
Doubled letters
3
Ending in S
10
Most frequent letter
I (18)

Questions

How many 14-letter words matching ___s_e________ are there?

20. 6 of them are common words.

What is a common example?

BOISTEROUSNESS is among the common words in this set.