14-Letter Words Matching __________R__N

There are 20 14-letter words that match __________R__N. 6 are common words, such as BUSINESSPERSON and CONGRESSPERSON. A rarer one is SPORTFISHERMEN. In this set, I is the most frequent open letter (19 words). 4 words contain a doubled letter.

Full list 20

businesspersoncongresspersondisciplinarianlatitudinarianseptuagenarianvaletudinarianattitudinarianinfralapsarianpredestinarianpremillenarianquodlibetariansupralapsarianuniformitarianethnohistorianichthyosauriannonutilitarianprotohistoriansolitudinariansportfishermansportfishermen

About this list

Words
20 (6 common words)
Common example
businessperson
Rare example
sportfishermen
Doubled letters
4
Ending in S
0
Most frequent letter
I (19)

Questions

How many 14-letter words matching __________r__n are there?

20. 6 of them are common words.

What is a common example?

BUSINESSPERSON is among the common words in this set.