12-Letter Words Matching ____O____N__

There are 51 12-letter words that match ____O____N__. 15 are common words, such as ANTIOXIDANTS and COMPORTMENTS. A rarer one is RADIOLUCENCY. In this set, I is the most frequent open letter (42 words). 3 words contain a doubled letter.

Full list 51

Common words

antioxidantscomportmentsconcomitantsdespoilmentsembroilmentsengrossmentsforeordainedimprovementsimprovidencemicrosecondsoutsourcingspredominance
antioxidantscomportmentsconcomitantsdespoilmentsembroilmentsengrossmentsforeordainedimprovementsimprovidencemicrosecondsoutsourcingspredominanceproportionalproportionedsurroundingsaminopyrinesapomorphinesconcomitancedislodgmentsdistortionalfemtosecondsmicrobalancemicrofinanceneurosciencephotoactinicpredominancypsilomelanesscopolaminessubdominantsamazonstonesantiozonantsbedcoveringscyclohexanescycloserinescyproteronesdisportmentsenfeoffmentsethnoscienceglucosamineshydroxyzineslangoustinesleukotrienesmicrotechnicnitrosaminesnoncompoundsnonconstantsnondominantspaleobotanicpremoistenedpreportionedradiolucency

About this list

Words
51 (15 common words)
Common example
antioxidants
Rare example
radiolucency
Doubled letters
3
Ending in S
33
Most frequent letter
I (42)

Questions

How many 12-letter words matching ____o____n__ are there?

51. 15 of them are common words.

What is a common example?

ANTIOXIDANTS is among the common words in this set.