13-Letter Words Matching _____S___O___

There are 23 13-letter words that match _____S___O___. 7 are common words, such as INQUISITIONAL and PREPOSITIONAL. A rarer one is OVIPOSITIONAL. In this set, T is the most frequent open letter (22 words). 2 words contain a doubled letter.

Full list 23

inquisitionalprepositionalprogesteronespropositionalpropositionedrequisitionedtestosteronesandrosteronesantipsychoticcompositionaldepressomotordispositionalleptospirosesleptospirosismispositionedrequisitionersuppositionalunsensationalacquisitionalextrasystolesfibrosarcomasosteosarcomasovipositional

About this list

Words
23 (7 common words)
Common example
inquisitional
Rare example
ovipositional
Doubled letters
2
Ending in S
8
Most frequent letter
T (22)

Questions

How many 13-letter words matching _____s___o___ are there?

23. 7 of them are common words.

What is a common example?

INQUISITIONAL is among the common words in this set.