13-Letter Words Matching ________N_N__

There are 16 13-letter words that match ________N_N__. 4 are common words, such as CONDITIONINGS and ENTERTAININGS. A rarer one is TRAMPOLININGS. 4 words contain a doubled letter.

Full list 16

conditioningsentertainingssubcontinentsunderpinningsdiscriminantsheartburningsbenzophenonesbourguignonnebreadwinningshydroquinonesmisdemeanantsnonhappeningsoverdominancesubcomponentssupereminencetrampolinings

About this list

Words
16 (4 common words)
Common example
conditionings
Rare example
trampolinings
Doubled letters
4
Ending in S
13

Questions

How many 13-letter words matching ________n_n__ are there?

16. 4 of them are common words.

What is a common example?

CONDITIONINGS is among the common words in this set.