15-Letter Words Matching _______R____R__

There are 14 15-letter words that match _______R____R__. 2 are common words, such as INFRASTRUCTURES and SUPERSTRUCTURES. A rarer one is ULTRASTRUCTURES. In this set, C is the most frequent open letter (14 words). 0 words contain a doubled letter.

Full list 14

infrastructuressuperstructuresinfrastructuralinterferometricsuperstructuralepichlorohydrinmacrostructuralmacrostructuresmicrostructuralmicrostructuresphonocardiogramsuperbureaucratultrastructuralultrastructures

About this list

Words
14 (2 common words)
Common example
infrastructures
Rare example
ultrastructures
Doubled letters
0
Ending in S
5
Most frequent letter
C (14)

Questions

How many 15-letter words matching _______r____r__ are there?

14. 2 of them are common words.

What is a common example?

INFRASTRUCTURES is among the common words in this set.