14-Letter Words Matching ____R__G______

There are 18 14-letter words that match ____R__G______. 5 are common words, such as CLEARINGHOUSES and INTERROGATIONS. A rarer one is WATERTIGHTNESS. In this set, E is the most frequent open letter (17 words). 8 words contain a doubled letter.

Full list 18

clearinghousesinterrogationsinterrogativesrearrangementsrestrengthenedintermigrationpartridgeberryarteriographicenduringnesseshyperpigmentedhypervigilanceinterdigitatedinterdigitatesintersegmentalretiringnessessubirrigationssuperorganismswatertightness

About this list

Words
18 (5 common words)
Common example
clearinghouses
Rare example
watertightness
Doubled letters
8
Ending in S
10
Most frequent letter
E (17)

Questions

How many 14-letter words matching ____r__g______ are there?

18. 5 of them are common words.

What is a common example?

CLEARINGHOUSES is among the common words in this set.