15-Letter Words Matching ________N___N__

There are 13 15-letter words that match ________N___N__. 3 are common words, such as DISAPPOINTMENTS and DISCONTENTMENTS. A rarer one is SUPERPHENOMENON. In this set, E is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 13

disappointmentsdiscontentmentsdisenchantmentsnonconventionaloverrefinementscounterinstancehypersomnolenceintertwinementsmethylxanthinesnoncarcinogenicpararosanilinesphytoplanktonicsuperphenomenon

About this list

Words
13 (3 common words)
Common example
disappointments
Rare example
superphenomenon
Doubled letters
2
Ending in S
7
Most frequent letter
E (12)

Questions

How many 15-letter words matching ________n___n__ are there?

13. 3 of them are common words.

What is a common example?

DISAPPOINTMENTS is among the common words in this set.