15-Letter Words Matching ____________R__

There are 57 15-letter words that match ____________R__. 7 are common words, such as ANTHROPOCENTRIC and CONCESSIONAIRES. A rarer one is ULTRASTRUCTURES. In this set, E is the most frequent open letter (49 words). 8 words contain a doubled letter.

Full list 57

Common words

anthropocentricconcessionairescounterculturescountermeasuresinfrastructuresperpendicularlysuperstructuresanticholesterolcentrosymmetriccholecalciferolcommissionairesdextrosinistral
anthropocentricconcessionairescounterculturescountermeasuresinfrastructuresperpendicularlysuperstructuresanticholesterolcentrosymmetriccholecalciferolcommissionairesdextrosinistralhydrometallurgyinfrastructuralinterferometricintramuscularlyknickerbockerednonagriculturalphenylketonuriapreagriculturalsinistrodextralsuperstructuralunspectacularlychordamesodermscontainerboardscounterculturalcytomegaloviruscytophotometricdiffractometricdistemperaturesepichlorohydrinextracellularlyhematoporphyrininterbehavioralintracellularlyintravascularlymacrostructuralmacrostructuresmagnetoelectricmaladministeredmicrostructuralmicrostructuresmonomolecularlyphenylketonuricphonocardiogramphotogrammetricpremanufacturedpremanufacturesradiotelemetricsporangiophoressuperbureaucratsupercalenderedsuperencipheredtetrahydrofuranultimogenituresultrastructuralultrastructures

About this list

Words
57 (7 common words)
Common example
anthropocentric
Rare example
ultrastructures
Doubled letters
8
Ending in S
16
Most frequent letter
E (49)

Questions

How many 15-letter words matching ____________r__ are there?

57. 7 of them are common words.

What is a common example?

ANTHROPOCENTRIC is among the common words in this set.