15-Letter Words Matching __________R__N_

There are 17 15-letter words that match __________R__N_. 6 are common words, such as BUSINESSPERSONS and CONGRESSPERSONS. A rarer one is UNIFORMITARIANS. In this set, I is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 17

businesspersonscongresspersonsdisciplinarianslatitudinariansseptuagenariansvaletudinariansweatherboardingcounterchargingethnohistoriansichthyosauriansinterconvertingnonutilitarianspredestinarianspremillenariansprotohistorianssolitudinariansuniformitarians

About this list

Words
17 (6 common words)
Common example
businesspersons
Rare example
uniformitarians
Doubled letters
3
Ending in S
14
Most frequent letter
I (16)

Questions

How many 15-letter words matching __________r__n_ are there?

17. 6 of them are common words.

What is a common example?

BUSINESSPERSONS is among the common words in this set.