12-Letter Words Matching ___R_____U__

There are 21 12-letter words that match ___R_____U__. 2 are common words, such as MICROCIRCUIT and OVEREXPOSURE. A rarer one is WHERETHROUGH. In this set, E is the most frequent open letter (19 words). 4 words contain a doubled letter.

Full list 21

microcircuitoverexposurecitriculturecorrectitudefloriculturemicrocapsulemitrailleuseolericultureoverfatiguedoverpressurebeardtonguescypripediumsextratextualleprosariumsmicrocultureoutreproduceoverdiscountoverfatiguestetrazoliumsultravacuumswherethrough

About this list

Words
21 (2 common words)
Common example
microcircuit
Rare example
wherethrough
Doubled letters
4
Ending in S
6
Most frequent letter
E (19)

Questions

How many 12-letter words matching ___r_____u__ are there?

21. 2 of them are common words.

What is a common example?

MICROCIRCUIT is among the common words in this set.