14-Letter Words Matching ____A___O_____

There are 40 14-letter words that match ____A___O_____. 9 are common words, such as ACETAMINOPHENS and ARCHAEOLOGICAL. A rarer one is VULCANOLOGISTS. In this set, I is the most frequent open letter (39 words). 5 words contain a doubled letter.

Full list 40

Common words

acetaminophensarchaeologicalarchaeologistscampanologistsclimatologistsdermatologicaldermatologistshermaphroditeshermaphroditiccampanologicalclimatologicaleschatological
acetaminophensarchaeologicalarchaeologistscampanologistsclimatologistsdermatologicaldermatologistshermaphroditeshermaphroditiccampanologicalclimatologicaleschatologicaleschatologistsextracanonicalmyocardiographnoncategoricaltetrachloridesthanatologicalultrasonographvulcanologicalcholangiogramscompassionatedcompassionatescompassionlesscotransportingnarratologicalnarratologistsneonatologistsonomatologistsprimatologicalprimatologistsretransformingsporangiophoresubcategorizedsubcategorizestetrafluoridesthanatologistsvolcanologicalvolcanologistsvulcanologists

About this list

Words
40 (9 common words)
Common example
acetaminophens
Rare example
vulcanologists
Doubled letters
5
Ending in S
20
Most frequent letter
I (39)

Questions

How many 14-letter words matching ____a___o_____ are there?

40. 9 of them are common words.

What is a common example?

ACETAMINOPHENS is among the common words in this set.