14-Letter Words Matching ________R___R_

There are 16 14-letter words that match ________R___R_. 4 are common words, such as ADMINISTRATORS and KINDERGARTNERS. A rarer one is TRANSMIGRATORS. In this set, T is the most frequent open letter (16 words). 2 words contain a doubled letter.

Full list 16

administratorskindergartnersphotoengraversundersecretarytransmigratorybraillewritersbreaststrokerscoconspiratorsconglomeratorscontainerboarddisintegratorsdistemperatureneurosecretorynoncooperatorsreinvigoratorstransmigrators

About this list

Words
16 (4 common words)
Common example
administrators
Rare example
transmigrators
Doubled letters
2
Ending in S
11
Most frequent letter
T (16)

Questions

How many 14-letter words matching ________r___r_ are there?

16. 4 of them are common words.

What is a common example?

ADMINISTRATORS is among the common words in this set.