15-Letter Words Matching _R__N__________

There are 19 15-letter words that match _R__N__________. 4 are common words, such as GROUNDBREAKINGS and PROGNOSTICATING. A rarer one is TRIANGULARITIES. In this set, I is the most frequent open letter (17 words). 6 words contain a doubled letter.

Full list 19

groundbreakingsprognosticatingprognosticationprognosticatorserroneousnessesgreensicknessesorganophosphateprognosticatoryprointerventionarrondissementsbrainlessnessesbraunschweigersorganochlorinesorganomercurialorganometallicsorientationallypreinterviewingprognosticativetriangularities

About this list

Words
19 (4 common words)
Common example
groundbreakings
Rare example
triangularities
Doubled letters
6
Ending in S
10
Most frequent letter
I (17)

Questions

How many 15-letter words matching _r__n__________ are there?

19. 4 of them are common words.

What is a common example?

GROUNDBREAKINGS is among the common words in this set.