15-Letter Words Matching ____A___O______

There are 14 15-letter words that match ____A___O______. 2 are common words, such as COMPASSIONATELY and DISPASSIONATELY. A rarer one is ULTRADEMOCRATIC. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 14

compassionatelydispassionatelyhermaphroditismmagnanimousnesstrypanosomiasisultrasonographyanfractuositiesantiaphrodisiaccholangiographycompassionatingsporangiophoressubcategorizingtrypanosomiasesultrademocratic

About this list

Words
14 (2 common words)
Common example
compassionately
Rare example
ultrademocratic
Doubled letters
4
Ending in S
5
Most frequent letter
I (13)

Questions

How many 15-letter words matching ____a___o______ are there?

14. 2 of them are common words.

What is a common example?

COMPASSIONATELY is among the common words in this set.