15-Letter Words Matching ___________ON__

There are 57 15-letter words that match ___________ON__. 8 are common words, such as CONFRONTATIONAL and DISPROPORTIONAL. A rarer one is ULTRAMARATHONER. In this set, I is the most frequent open letter (53 words). 11 words contain a doubled letter.

Full list 57

Common words

confrontationaldisproportionalimprovisationalmicroelectronicnonoccupationalnonprofessionalradiotelephonessubprofessionalcommunicationalconfigurationalcorticosteroneshallucinational
confrontationaldisproportionalimprovisationalmicroelectronicnonoccupationalnonprofessionalradiotelephonessubprofessionalcommunicationalconfigurationalcorticosteroneshallucinationalhydrocortisonesinterrogationaljuxtapositionallabyrinthodontsmalpractitionermultifunctionalnoncommissionednonconventionalomnidirectionalpleuropneumoniapreprofessionalradiotelephonictranscriptionalaccommodationalacculturationalantieducationalantitraditionalboustrophedoniccounterresponsedemonstrationaldisproportioneddocumentationalenterogastroneshyperfunctionalinterdivisionalinterelectronicintrospectionalinvestigationalmiscegenationalmultidivisionalnoninflectionalorchestrationalparticipationalpentobarbitonesphenobarbitonesphenylbutazonesphotoelectronicphytoplanktonicpronunciationalrecombinationalsulfinpyrazonesthyrocalcitonintranspirationaltranspositionalultramarathoner

About this list

Words
57 (8 common words)
Common example
confrontational
Rare example
ultramarathoner
Doubled letters
11
Ending in S
9
Most frequent letter
I (53)

Questions

How many 15-letter words matching ___________on__ are there?

57. 8 of them are common words.

What is a common example?

CONFRONTATIONAL is among the common words in this set.