13-Letter Words Matching ____R_____O__

There are 97 13-letter words that match ____R_____O__. 39 are common words, such as CHLORINATIONS and COLORIZATIONS. A rarer one is VELARIZATIONS. In this set, S is the most frequent open letter (88 words). 17 words contain a doubled letter.

Full list 97

Common words

chlorinationscolorizationscongregationscontradictorycontributionsdistributionsexterminatorsfluoridationsfluorocarbonsheterogeneoushypertensionsimperfections
chlorinationscolorizationscongregationscontradictorycontributionsdistributionsexterminatorsfluoridationsfluorocarbonsheterogeneoushypertensionsimperfectionsimpersonatorsinsurrectionsinterceptionsintercessionsinterdictionsinterjectionsinterlocutorsinterlocutoryintermissionsinterrogatorsinterrogatoryinterruptionsintersectionsintersessionsinterventionsmemorizationsmotorizationsnotarizationsoverreactionspolarizationsrepercussionsresurrectionssuperstitionssuperstitioussuperventionsunceremoniousvaporizationsanthraquinoneantireligiousapperceptionsarteriovenouscontrabassoondextroglucosedivaricationsexterminatorygastrulationsheteropterousheterosporousincorruptionsmembranaceousmembranophoneoverrighteouspancreatotomyreverberatorysemireligioussupersessionsarborizationsautorotationsbaroreceptorsbutyrophenonecamerapersonscavernicolouscontradictorscurarizationsdecorticatorsdeterminatorsdimerizationsenterocoelousetherizationsexteroceptorsfiberizationsfluorinationsheterocystousheterokaryonshypercautioushyperreactorsincorporatorsinteroceptorsinterpolatorslaterizationsnongregariouspreprocessorssolarizationssuberizationssubordinatorssupercautioussuperpatriotssuperstardomssuperstationssupersurgeonssupervirtuosisupervirtuosotheorizationsvalorizationsvelarizations

About this list

Words
97 (39 common words)
Common example
chlorinations
Rare example
velarizations
Doubled letters
17
Ending in S
84
Most frequent letter
S (88)

Questions

How many 13-letter words matching ____r_____o__ are there?

97. 39 of them are common words.

What is a common example?

CHLORINATIONS is among the common words in this set.