14-Letter Words Matching A_______C_____

There are 20 14-letter words that match A_______C_____. 6 are common words, such as ANTIDEMOCRATIC and ANTIGENICITIES. A rarer one is AUTOMATICITIES. In this set, I is the most frequent open letter (20 words). 3 words contain a doubled letter.

Full list 20

antidemocraticantigenicitiesapprenticeshipauthenticatingauthenticationauthenticitiesabortifacientsadenocarcinomaauthenticatorsactinomycetousaestheticizingammonificationanelasticitiesantidesiccantsantiradicalismaperiodicitiesapostolicitiesarchaebacteriaautoinfectionsautomaticities

About this list

Words
20 (6 common words)
Common example
antidemocratic
Rare example
automaticities
Doubled letters
3
Ending in S
11
Most frequent letter
I (20)

Questions

How many 14-letter words matching a_______c_____ are there?

20. 6 of them are common words.

What is a common example?

ANTIDEMOCRATIC is among the common words in this set.