15-Letter Words Matching ____G____N_____

There are 12 15-letter words that match ____G____N_____. 5 are common words, such as EGREGIOUSNESSES and LITIGIOUSNESSES. A rarer one is ILLOGICALNESSES. 11 words contain a doubled letter.

Full list 12

egregiousnesseslitigiousnessesreligiousnessessprightlinessesunsightlinessesambiguousnessesbenightednesseschangefulnessesdelightednesseseasygoingnesseshemoglobinuriasillogicalnesses

About this list

Words
12 (5 common words)
Common example
egregiousnesses
Rare example
illogicalnesses
Doubled letters
11
Ending in S
12

Questions

How many 15-letter words matching ____g____n_____ are there?

12. 5 of them are common words.

What is a common example?

EGREGIOUSNESSES is among the common words in this set.