14-Letter Words Matching ______R_O_____

There are 20 14-letter words that match ______R_O_____. 9 are common words, such as COUNTERPOISING and DAGUERREOTYPED. A rarer one is WEATHERBOARDED. In this set, E is the most frequent open letter (18 words). 8 words contain a doubled letter.

Full list 20

counterpoisingdaguerreotypeddaguerreotypesknickerbockersreincorporatedreincorporatessoundproofingsunincorporatedwaterproofingscounterpointedanticorrosivesantiterrorismsantiterroristsdiastereomericmegakaryocytesmegakaryocyticmonocarboxylicpolycarbonateswaterproofnessweatherboarded

About this list

Words
20 (9 common words)
Common example
counterpoising
Rare example
weatherboarded
Doubled letters
8
Ending in S
11
Most frequent letter
E (18)

Questions

How many 14-letter words matching ______r_o_____ are there?

20. 9 of them are common words.

What is a common example?

COUNTERPOISING is among the common words in this set.