13-Letter Words Matching A_____N______

There are 15 13-letter words that match A_____N______. 4 are common words, such as ACQUAINTANCES and ACRIMONIOUSLY. A rarer one is ARSPHENAMINES. In this set, I is the most frequent open letter (15 words). 3 words contain a doubled letter.

Full list 15

acquaintancesacrimoniouslyargumentationargumentativeacrylonitrileaerodynamicalaggiornamentoantepenultimaarundinaceousabiogenicallyanthranilatesanticonsumersantigenicallyarmamentariumarsphenamines

About this list

Words
15 (4 common words)
Common example
acquaintances
Rare example
arsphenamines
Doubled letters
3
Ending in S
5
Most frequent letter
I (15)

Questions

How many 13-letter words matching a_____n______ are there?

15. 4 of them are common words.

What is a common example?

ACQUAINTANCES is among the common words in this set.