12-Letter Words Matching _____R_U____

There are 13 12-letter words that match _____R_U____. 5 are common words, such as BACKGROUNDER and FOREGROUNDED. A rarer one is WIENERWURSTS. In this set, E is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 13

backgrounderforegroundedjitterbuggedjitterbuggerbackgroundedbacteriuriasinoperculatenonmercurialnonturbulentoverarousalspreformulatewienerwurstsmotherfucker

About this list

Words
13 (5 common words)
Common example
backgrounder
Rare example
wienerwursts
Doubled letters
2
Ending in S
3
Most frequent letter
E (13)

Questions

How many 12-letter words matching _____r_u____ are there?

13. 5 of them are common words.

What is a common example?

BACKGROUNDER is among the common words in this set.