15-Letter Words Matching ___O____O______

There are 23 15-letter words that match ___O____O______. 8 are common words, such as ENDOCRINOLOGIES and ENDOCRINOLOGIST. A rarer one is XERORADIOGRAPHY. In this set, I is the most frequent open letter (20 words). 5 words contain a doubled letter.

Full list 23

endocrinologiesendocrinologisthypothyroidismsincongruousnessrevolutionariesrevolutionisingrevolutionizingunconsciousnessautolithographyautoradiographshomogeneousnessignominiousnessautochthonouslyautoradiographychronobiologieschronobiologistcytophotometricrevolutionarilyrevolutionizerssaponaceousnessstrongyloidosesstrongyloidosisxeroradiography

About this list

Words
23 (8 common words)
Common example
endocrinologies
Rare example
xeroradiography
Doubled letters
5
Ending in S
13
Most frequent letter
I (20)

Questions

How many 15-letter words matching ___o____o______ are there?

23. 8 of them are common words.

What is a common example?

ENDOCRINOLOGIES is among the common words in this set.