12-Letter Words Matching ___O____O___

There are 37 12-letter words that match ___O____O___. 5 are common words, such as FLUOROSCOPES and FLUOROSCOPIC. A rarer one is WIDOWERHOODS. In this set, I is the most frequent open letter (25 words). 5 words contain a doubled letter.

Full list 37

Common words

fluoroscopesfluoroscopichypothyroidsstroboscopesstroboscopicaeroneurosisaldosteronesappositionalautochthonesautohypnosischronoscopesdenotational
fluoroscopesfluoroscopichypothyroidsstroboscopesstroboscopicaeroneurosisaldosteronesappositionalautochthonesautohypnosischronoscopesdenotationaldepositionalexpositionalgerontologichypocycloidsinnovationalintonationalinvolutionalkilocoulombsmonophthongsoppositionalrepositionedautohypnosesautohypnoticchromophoreschromophoricfluoroscopedhypodiploidyinvocationalirrotationalketosteroidsmesocyclonesmotoneuronalperorationalpogonophoranwidowerhoods

About this list

Words
37 (5 common words)
Common example
fluoroscopes
Rare example
widowerhoods
Doubled letters
5
Ending in S
16
Most frequent letter
I (25)

Questions

How many 12-letter words matching ___o____o___ are there?

37. 5 of them are common words.

What is a common example?

FLUOROSCOPES is among the common words in this set.