15-Letter Words Matching _A___O_________

There are 14 15-letter words that match _A___O_________. 4 are common words, such as CARDIOPULMONARY and CATEGORIZATIONS. A rarer one is PARAROSANILINES. In this set, I is the most frequent open letter (14 words). 7 words contain a doubled letter.

Full list 14

cardiopulmonarycategorizationsgastroenteritisgastronomicallyfashionablenessgastrologicallypassionlessnessvasoconstrictoreasygoingnessespalynologicallyparadoxicalnessparajournalismsparanormalitiespararosanilines

About this list

Words
14 (4 common words)
Common example
cardiopulmonary
Rare example
pararosanilines
Doubled letters
7
Ending in S
9
Most frequent letter
I (14)

Questions

How many 15-letter words matching _a___o_________ are there?

14. 4 of them are common words.

What is a common example?

CARDIOPULMONARY is among the common words in this set.