15-Letter Words Matching R_____R________

There are 14 15-letter words that match R_____R________. 5 are common words, such as REAPPORTIONMENT and REDISTRIBUTIONS. A rarer one is REVALORIZATIONS. 3 words contain a doubled letter.

Full list 14

reapportionmentredistributionsregularizationsreincorporatingreincorporationreafforestationredeterminationretrogressivelyradioprotectionradioprotectiverematerializingrepolarizationsretrogradationsrevalorizations

About this list

Words
14 (5 common words)
Common example
reapportionment
Rare example
revalorizations
Doubled letters
3
Ending in S
5

Questions

How many 15-letter words matching r_____r________ are there?

14. 5 of them are common words.

What is a common example?

REAPPORTIONMENT is among the common words in this set.