13-Letter Words Matching ____R__O_____

There are 64 13-letter words that match ____R__O_____. 23 are common words, such as ACCORDIONISTS and AFTERTHOUGHTS. A rarer one is WATERPROOFERS. In this set, I is the most frequent open letter (50 words). 11 words contain a doubled letter.

Full list 64

Common words

accordionistsafterthoughtsapportionmentchloroformingdisproportionexcursionistsextortionistsfuturologistsgastronomicalhypertrophiedhypertrophiesmineralogical
accordionistsafterthoughtsapportionmentchloroformingdisproportionexcursionistsextortionistsfuturologistsgastronomicalhypertrophiedhypertrophiesmineralogicalmineralogistsmispronouncedmispronouncesnumerologistsunceremoniousunderclothingundershootingventriloquiesventriloquismventriloquistwaterproofinganthropogenicanthropolatryanthropologicanthropometryanthropopathyanthropophagianthropophagyanthroposophygastrologicalheteromorphicmembranophonenumerologicalventriloquizeanthropomorphapportionabledendrologicaldendrologistsdiversionistsenterocoelousenterocolitisfuturologicalgastronomistshemorrhoidalshyperarousalshyperploidieshyperproducerintercroppingintercrossinginterproximalintertropicalmoderatorshipnephrologistsoverreportingpapyrologistspolyribosomalpolyribosomessuperaboundedundergrounderventriloquialwaterfloodingwaterproofers

About this list

Words
64 (23 common words)
Common example
accordionists
Rare example
waterproofers
Doubled letters
11
Ending in S
23
Most frequent letter
I (50)

Questions

How many 13-letter words matching ____r__o_____ are there?

64. 23 of them are common words.

What is a common example?

ACCORDIONISTS is among the common words in this set.