12-Letter Words Matching _____R___R__

There are 15 12-letter words that match _____R___R__. 6 are common words, such as CENTERBOARDS and FINGERBOARDS. A rarer one is UNDERREPORTS. In this set, O is the most frequent open letter (14 words). 3 words contain a doubled letter.

Full list 15

centerboardsfingerboardsmortarboardsmotherboardsrotogravurestemperaturesachlorhydriafissirostralteeterboardsachlorhydricbeaverboardscryopreservedipterocarpselectroformsunderreports

About this list

Words
15 (6 common words)
Common example
centerboards
Rare example
underreports
Doubled letters
3
Ending in S
11
Most frequent letter
O (14)

Questions

How many 12-letter words matching _____r___r__ are there?

15. 6 of them are common words.

What is a common example?

CENTERBOARDS is among the common words in this set.