13-Letter Words Matching __N_________R

There are 14 13-letter words that match __N_________R. 2 are common words, such as CONCERTMASTER and KINDERGARTNER. A rarer one is NONPROGRAMMER. In this set, C is the most frequent open letter (12 words). 4 words contain a doubled letter.

Full list 14

concertmasterkindergartnercongratulatorconventioneermonomolecularsinistrocularcandlelightercandlesnufferconglomeratormonochromatornonchurchgoernoncompetitornoncooperatornonprogrammer

About this list

Words
14 (2 common words)
Common example
concertmaster
Rare example
nonprogrammer
Doubled letters
4
Ending in S
0
Most frequent letter
C (12)

Questions

How many 13-letter words matching __n_________r are there?

14. 2 of them are common words.

What is a common example?

CONCERTMASTER is among the common words in this set.