12-Letter Words Matching __G___A_____

There are 20 12-letter words that match __G___A_____. 9 are common words, such as AGGRAVATIONS and AGGREGATIONS. A rarer one is REGIONALIZES. In this set, I is the most frequent open letter (20 words). 5 words contain a doubled letter.

Full list 20

aggravationsaggregationsdegradationslegislationslegislaturesnegotiationspiggybackingregionalismssegregationsargillaceoushagiolatriesloganiaceousnightwalkersaggradationsdegustationsengarlandinglegislativesregionalistsregionalizedregionalizes

About this list

Words
20 (9 common words)
Common example
aggravations
Rare example
regionalizes
Doubled letters
5
Ending in S
17
Most frequent letter
I (20)

Questions

How many 12-letter words matching __g___a_____ are there?

20. 9 of them are common words.

What is a common example?

AGGRAVATIONS is among the common words in this set.