12-Letter Words Matching _______N___R

There are 21 12-letter words that match _______N___R. 4 are common words, such as CONTAMINATOR and EXTERMINATOR. A rarer one is SUBORDINATOR. In this set, I is the most frequent open letter (20 words). 4 words contain a doubled letter.

Full list 21

contaminatorexterminatorimpersonatorprimogenitorcarillonneurdisentanglerdisseminatorfrontbencherhallucinatormicromanagerperegrinatorpredominatorratiocinatorsynchronizerassassinatordecarbonizerdeterminatorfractionatorskeletonizerstickhandlersubordinator

About this list

Words
21 (4 common words)
Common example
contaminator
Rare example
subordinator
Doubled letters
4
Ending in S
0
Most frequent letter
I (20)

Questions

How many 12-letter words matching _______n___r are there?

21. 4 of them are common words.

What is a common example?

CONTAMINATOR is among the common words in this set.