13-Letter Words Matching _S____O______

There are 16 13-letter words that match _S____O______. 2 are common words, such as ASSIDUOUSNESS and OSCILLOSCOPES. A rarer one is PSYCHROPHILIC. In this set, I is the most frequent open letter (14 words). 6 words contain a doubled letter.

Full list 16

assiduousnessoscilloscopesastereognosisasthenosphereeschatologieseschatologistisodimorphismoscillographsoscilloscopicpsychrometersisoalloxazineisochromosomeisochronouslyoscillographypsychrometricpsychrophilic

About this list

Words
16 (2 common words)
Common example
assiduousness
Rare example
psychrophilic
Doubled letters
6
Ending in S
6
Most frequent letter
I (14)

Questions

How many 13-letter words matching _s____o______ are there?

16. 2 of them are common words.

What is a common example?

ASSIDUOUSNESS is among the common words in this set.