15-Letter Words Matching ____R_N________

There are 28 15-letter words that match ____R_N________. 10 are common words, such as CONFRONTATIONAL and DISGRUNTLEMENTS. A rarer one is UNDERINFLATIONS. In this set, I is the most frequent open letter (27 words). 3 words contain a doubled letter.

Full list 28

Common words

confrontationaldisgruntlementsenvironmentallygastronomicallynontransferablerestrengtheningsuperannuationssuperintendencesuperintendencysuperintendentslabyrinthodontsmistranslations
confrontationaldisgruntlementsenvironmentallygastronomicallynontransferablerestrengtheningsuperannuationssuperintendencesuperintendencysuperintendentslabyrinthodontsmistranslationssuperindividualunderinvestmenthyperinflationshyperinsulinismhyperinvolutioninteranimationsinterindividualinterinfluencedinterinfluencesinteruniversitymistranscribingsuperencipheredsuperinductionssuperinfectionsunchronologicalunderinflations

About this list

Words
28 (10 common words)
Common example
confrontational
Rare example
underinflations
Doubled letters
3
Ending in S
11
Most frequent letter
I (27)

Questions

How many 15-letter words matching ____r_n________ are there?

28. 10 of them are common words.

What is a common example?

CONFRONTATIONAL is among the common words in this set.