13-Letter Words Matching R______O_____

There are 24 13-letter words that match R______O_____. 7 are common words, such as RADIOISOTOPES and RECEPTIONISTS. A rarer one is RETICULOCYTES. In this set, T is the most frequent open letter (21 words). 3 words contain a doubled letter.

Full list 24

radioisotopesreceptionistsredevelopmentreinvigoratedreinvigoratesrendezvousingrutherfordiumradiationallyreductionistsrefractometerrollercoasterradiationlessradiobiologicradioisotopicradiothoriumsrechoreographreductionismsreflectometerreflectometryreflectorizedreflectorizesrefractometryreinvigoratorreticulocytes

About this list

Words
24 (7 common words)
Common example
radioisotopes
Rare example
reticulocytes
Doubled letters
3
Ending in S
9
Most frequent letter
T (21)

Questions

How many 13-letter words matching r______o_____ are there?

24. 7 of them are common words.

What is a common example?

RADIOISOTOPES is among the common words in this set.