13-Letter Words Matching ________N___N

There are 16 13-letter words that match ________N___N. 4 are common words, such as CIRCUMVENTION and COMPREHENSION. A rarer one is TRANSMOUNTAIN. In this set, O is the most frequent open letter (15 words). 3 words contain a doubled letter.

Full list 16

circumventioncomprehensioncondescensioncontraventionoverexpansionphytoplanktoncanthaxanthinintermountainmicroplanktonmilliroentgennannoplanktonnoncarcinogenoverattentionoverextensionpreconventiontransmountain

About this list

Words
16 (4 common words)
Common example
circumvention
Rare example
transmountain
Doubled letters
3
Ending in S
0
Most frequent letter
O (15)

Questions

How many 13-letter words matching ________n___n are there?

16. 4 of them are common words.

What is a common example?

CIRCUMVENTION is among the common words in this set.