12-Letter Words Matching ____R______R

There are 42 12-letter words that match ____R______R. 8 are common words, such as EXPERIMENTER and EXTERMINATOR. A rarer one is WATERPROOFER. In this set, E is the most frequent open letter (36 words). 10 words contain a doubled letter.

Full list 42

Common words

experimenterexterminatorimpersonatorinterlocutorinterrogatorinterstellarquadrangularsuperchargercontradictercontradictorexteroceptorincarcerator
experimenterexterminatorimpersonatorinterlocutorinterrogatorinterstellarquadrangularsuperchargercontradictercontradictorexteroceptorincarceratorincorporatorinternuclearinteroceptorinterpleaderinterpolatorreverberatorunderstanderbaroreceptorcocurricularcontroverterdecarbonizerdecorticatordeterminatordiverticularhyperreactorimmortalizerinterchangerinterclusterinterlaminarinterlobularintermeddlermaterializernoncrossoverpreprocessorsuborbicularsubordinatorsupercarriersuperclustertabernacularwaterproofer

About this list

Words
42 (8 common words)
Common example
experimenter
Rare example
waterproofer
Doubled letters
10
Ending in S
0
Most frequent letter
E (36)

Questions

How many 12-letter words matching ____r______r are there?

42. 8 of them are common words.

What is a common example?

EXPERIMENTER is among the common words in this set.