15-Letter Words Matching ___R_____R_____

There are 18 15-letter words that match ___R_____R_____. 2 are common words, such as OVERSUBSCRIBING and PREREGISTRATION. A rarer one is ULTRAMODERNISTS. In this set, I is the most frequent open letter (17 words). 1 words contain a doubled letter.

Full list 18

oversubscribingpreregistrationchurrigueresquenitrochloroformoverprescribingultracentrifugemisregistrationoverconstructedoverelaboratingoverelaborationoverencouragingoverglamorizingoverproportionsreorchestratingreorchestrationultrafiltrationultraliberalismultramodernists

About this list

Words
18 (2 common words)
Common example
oversubscribing
Rare example
ultramodernists
Doubled letters
1
Ending in S
2
Most frequent letter
I (17)

Questions

How many 15-letter words matching ___r_____r_____ are there?

18. 2 of them are common words.

What is a common example?

OVERSUBSCRIBING is among the common words in this set.