14-Letter Words Matching ______N_N_____

There are 23 14-letter words that match ______N_N_____. 3 are common words, such as FLEETINGNESSES and PLEASANTNESSES. A rarer one is TRUSTINGNESSES. 22 words contain a doubled letter.

Full list 23

fleetingnessespleasantnessesprofoundnessesfemininenessesobligingnessessanguinenessesapparentnessesenduringnessesexactingnessesfrequentnessesgraspingnessesignorantnessesmilitantnessesoutgoingnessespleasingnessespurblindnessesretiringnessesserotoninergicsoothingnessessterlingnessessweepingnessesthinkingnessestrustingnesses

About this list

Words
23 (3 common words)
Common example
fleetingnesses
Rare example
trustingnesses
Doubled letters
22
Ending in S
22

Questions

How many 14-letter words matching ______n_n_____ are there?

23. 3 of them are common words.

What is a common example?

FLEETINGNESSES is among the common words in this set.