13-Letter Words Matching ____G_N______

There are 18 13-letter words that match ____G_N______. 6 are common words, such as HOMOGENEITIES and HOMOGENEOUSLY. A rarer one is REENGINEERING. In this set, I is the most frequent open letter (17 words). 8 words contain a doubled letter.

Full list 18

homogeneitieshomogeneouslyinorganicallynonagenariansoctogenarianssexagenariansboraginaceouscryogenicallyinvaginationsontogenicallyabiogenicallyantigenicallycytogeneticalemarginationshalogenationsmonogenicallymutagenicallyreengineering

About this list

Words
18 (6 common words)
Common example
homogeneities
Rare example
reengineering
Doubled letters
8
Ending in S
8
Most frequent letter
I (17)

Questions

How many 13-letter words matching ____g_n______ are there?

18. 6 of them are common words.

What is a common example?

HOMOGENEITIES is among the common words in this set.