14-Letter Words Matching N___N_________

There are 18 14-letter words that match N___N_________. 2 are common words, such as NONENFORCEABLE and NONINDEPENDENT. A rarer one is NUMINOUSNESSES. In this set, O is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 18

nonenforceablenonindependentnonenforcementnoninflammablenoninformativenoninhabitablenoninstinctivenonintercoursenomenclatorialnonantibioticsnonengagementsnonengineeringnoninformationnoninstallmentnoninteractingnoninteractivenoninvolvementnuminousnesses

About this list

Words
18 (2 common words)
Common example
nonenforceable
Rare example
numinousnesses
Doubled letters
4
Ending in S
3
Most frequent letter
O (18)

Questions

How many 14-letter words matching n___n_________ are there?

18. 2 of them are common words.

What is a common example?

NONENFORCEABLE is among the common words in this set.