14-Letter Words Matching ____S___O_____

There are 16 14-letter words that match ____S___O_____. 6 are common words, such as AMBASSADORSHIP and HARPSICHORDIST. A rarer one is TRANSISTORISES. In this set, I is the most frequent open letter (15 words). 5 words contain a doubled letter.

Full list 16

ambassadorshipharpsichordisthomeschoolingstransistorizedtransistorizestransitionallykinesiologicalmegasporophyllphraseologicalsemasiologicalaldosteronismslegislatorshipoppositionistsphraseologiststransistorisedtransistorises

About this list

Words
16 (6 common words)
Common example
ambassadorship
Rare example
transistorises
Doubled letters
5
Ending in S
6
Most frequent letter
I (15)

Questions

How many 14-letter words matching ____s___o_____ are there?

16. 6 of them are common words.

What is a common example?

AMBASSADORSHIP is among the common words in this set.