13-Letter Words Matching ____S______S_

There are 31 13-letter words that match ____S______S_. 5 are common words, such as EQUESTRIANISM and IMPASSIVENESS. A rarer one is WHIMSICALNESS. In this set, N is the most frequent open letter (28 words). 18 words contain a doubled letter.

Full list 31

Common words

equestrianismimpassivenessindustrialismindustrialistobsessivenesscatastrophismcatastrophistclasslessnessexcessivenessincessantnesskinesiologistoccasionalism
equestrianismimpassivenessindustrialismindustrialistobsessivenesscatastrophismcatastrophistclasslessnessexcessivenessincessantnesskinesiologistoccasionalismpedestrianismphraseologistplausiblenessrecessivenessstressfulnessadvisablenessaldosteronismantisocialistexcusablenessindustrialiseinfusiblenessinvisiblenessoppositionistoversweetnessreposefulnessresistivenesstranscriptasetransistorisewhimsicalness

About this list

Words
31 (5 common words)
Common example
equestrianism
Rare example
whimsicalness
Doubled letters
18
Ending in S
16
Most frequent letter
N (28)

Questions

How many 13-letter words matching ____s______s_ are there?

31. 5 of them are common words.

What is a common example?

EQUESTRIANISM is among the common words in this set.