15-Letter Words Matching ____R______R___

There are 13 15-letter words that match ____R______R___. 2 are common words, such as INTERROGATORIES and SUPERNUMERARIES. A rarer one is SUPERSYMMETRIES. 4 words contain a doubled letter.

Full list 13

interrogatoriessupernumerariesanthropometriesarboriculturistcontradictorilyinterrogatorilycontradictoriesenterobacterialenterobacteriuminterlacustrinenonprofessorialrechromatographsupersymmetries

About this list

Words
13 (2 common words)
Common example
interrogatories
Rare example
supersymmetries
Doubled letters
4
Ending in S
5

Questions

How many 15-letter words matching ____r______r___ are there?

13. 2 of them are common words.

What is a common example?

INTERROGATORIES is among the common words in this set.