14-Letter Words Matching A___________A_

There are 19 14-letter words that match A___________A_. 3 are common words, such as ALPHANUMERICAL and ARCHAEOLOGICAL. A rarer one is AXISYMMETRICAL. In this set, I is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 19

alphanumericalarchaeologicalarchiepiscopalambulancewomananagrammaticalanisometropiasantipatheticalarboriculturalattitudinarianadrenocorticalaerobiologicalaminoaciduriasantepenultimasanticommercialantiguerrillasantihistoricalantihomosexualantitubercularaxisymmetrical

About this list

Words
19 (3 common words)
Common example
alphanumerical
Rare example
axisymmetrical
Doubled letters
5
Ending in S
4
Most frequent letter
I (18)

Questions

How many 14-letter words matching a___________a_ are there?

19. 3 of them are common words.

What is a common example?

ALPHANUMERICAL is among the common words in this set.