6-Letter Words Matching ___R_N

There are 35 6-letter words that match ___R_N. 12 are common words, such as BARREN and CITRON. A rarer one is PTERIN. In this set, O is the most frequent open letter (25 words). 6 words contain a doubled letter.

Full list 35

Common words

barrencitronfibrinflorinmacronmatronmicronneuronoutranoutrunpatronwarren
barrencitronfibrinflorinmacronmatronmicronneuronoutranoutrunpatronwarrenchyronaldrinanurancitrinendrinestrinfiorinhadronmarronnatronoperonperronshoransovranthoronbicroncurrandiurongarronintronladronmikronpterin

About this list

Words
35 (12 common words)
Common example
barren
Rare example
pterin
Doubled letters
6
Ending in S
0
Most frequent letter
O (25)

Questions

How many 6-letter words matching ___r_n are there?

35. 12 of them are common words.

What is a common example?

BARREN is among the common words in this set.