15-Letter Words Matching R______T_______

There are 23 15-letter words that match R______T_______. 3 are common words, such as RADIOACTIVITIES and REAPPORTIONMENT. A rarer one is RUDIMENTARINESS. In this set, I is the most frequent open letter (23 words). 6 words contain a doubled letter.

Full list 23

radioactivitiesreapportionmentrestrictivenessradiometricallyrecalcitranciesreconditenessesreinvestigationradioautographsradioautographyrehospitalizingreindustrializereinvestigatingreprivatizationrepudiationistsrequisitenessesreregistrationsreservationistsrespiritualizedrespiritualizesrestrictionismsrestrictionistsretroactivitiesrudimentariness

About this list

Words
23 (3 common words)
Common example
radioactivities
Rare example
rudimentariness
Doubled letters
6
Ending in S
14
Most frequent letter
I (23)

Questions

How many 15-letter words matching r______t_______ are there?

23. 3 of them are common words.

What is a common example?

RADIOACTIVITIES is among the common words in this set.