15-Letter Words Matching ____R______A___

There are 46 15-letter words that match ____R______A___. 14 are common words, such as BIDIRECTIONALLY and CONTRAINDICATED. A rarer one is XERORADIOGRAPHY. In this set, I is the most frequent open letter (43 words). 21 words contain a doubled letter.

Full list 46

Common words

bidirectionallycontraindicatedcontraindicatescontroversiallyenvironmentallygastronomicallyhypercriticallyhyperventilatedhyperventilatesinterchangeableinterchangeablyinternationally
bidirectionallycontraindicatedcontraindicatescontroversiallyenvironmentallygastronomicallyhypercriticallyhyperventilatedhyperventilatesinterchangeableinterchangeablyinternationallynontransferablepaterfamiliasesalgorithmicallyautoradiographscongressionallygastrologicallyheterochromaticheterochromatininterpenetratedinterpenetratesinterpersonallylogarithmicallymineralogicallyobservationallyproprietoriallysynergisticallytribromoethanolautoradiographyepeirogenicallyhypercoagulablehyperstimulatedhyperstimulatesinformationallyintercorrelatedintercorrelatesinterculturallymaterfamiliasesnonaristocraticnoncredentialedsuperphosphatessuperstimulatedsuperstimulatesventriloquiallyxeroradiography

About this list

Words
46 (14 common words)
Common example
bidirectionally
Rare example
xeroradiography
Doubled letters
21
Ending in S
10
Most frequent letter
I (43)

Questions

How many 15-letter words matching ____r______a___ are there?

46. 14 of them are common words.

What is a common example?

BIDIRECTIONALLY is among the common words in this set.