11-Letter Words Matching I_____G____

There are 12 11-letter words that match I_____G____. 3 are common words, such as IDEOLOGICAL and IDEOLOGISTS. A rarer one is INTERAGENCY. In this set, I is the most frequent open letter (11 words). 5 words contain a doubled letter.

Full list 12

ideologicalideologistsirreligiousimmitigableimmunogenicinfrangibleinfrangiblyirreligionsideologizedideologizesimmitigablyinteragency

About this list

Words
12 (3 common words)
Common example
ideological
Rare example
interagency
Doubled letters
5
Ending in S
4
Most frequent letter
I (11)

Questions

How many 11-letter words matching i_____g____ are there?

12. 3 of them are common words.

What is a common example?

IDEOLOGICAL is among the common words in this set.