14-Letter Words Matching ____D___N_____

There are 12 14-letter words that match ____D___N_____. 4 are common words, such as CHILDISHNESSES and DREADFULNESSES. A rarer one is XENODIAGNOSTIC. In this set, S is the most frequent open letter (11 words). 6 words contain a doubled letter.

Full list 12

childishnessesdreadfulnessessemidarknessesswordsmanshipsoverdependencecloddishnessesfiendishnessesfraudulentnessombudsmanshipsoverdominancesserodiagnosticxenodiagnostic

About this list

Words
12 (4 common words)
Common example
childishnesses
Rare example
xenodiagnostic
Doubled letters
6
Ending in S
9
Most frequent letter
S (11)

Questions

How many 14-letter words matching ____d___n_____ are there?

12. 4 of them are common words.

What is a common example?

CHILDISHNESSES is among the common words in this set.