12-Letter Words Matching A________G__

There are 13 12-letter words that match A________G__. 7 are common words, such as ACKNOWLEDGED and ACKNOWLEDGES. A rarer one is ANTIESTROGEN. In this set, E is the most frequent open letter (11 words). 4 words contain a doubled letter.

Full list 13

acknowledgedacknowledgesaforethoughtafterthoughtappetizinglyarchipelagosastoundinglyagglutinogenantiallergicappraisinglyarchaeologicarchipelagicantiestrogen

About this list

Words
13 (7 common words)
Common example
acknowledged
Rare example
antiestrogen
Doubled letters
4
Ending in S
2
Most frequent letter
E (11)

Questions

How many 12-letter words matching a________g__ are there?

13. 7 of them are common words.

What is a common example?

ACKNOWLEDGED is among the common words in this set.