13-Letter Words Matching A_______O____

There are 38 13-letter words that match A_______O____. 10 are common words, such as ACETAMINOPHEN and ACRIMONIOUSLY. A rarer one is AUTORADIOGRAM. In this set, I is the most frequent open letter (31 words). 10 words contain a doubled letter.

Full list 38

Common words

acetaminophenacrimoniouslyadventurouslyambassadorialantimicrobialantipersonnelarchaeologiesarchaeologistarchbishopricavoirdupoisesacetylcholineagglutinogens
acetaminophenacrimoniouslyadventurouslyambassadorialantimicrobialantipersonnelarchaeologiesarchaeologistarchbishopricavoirdupoisesacetylcholineagglutinogensagrobiologiesallochthonousamphibologiesamphictyoniesanachronouslyandrogynouslyanfractuosityannexationismannexationistanticlinoriumanticorrosiveantiterrorismantiterroristapogeotropismarchdeaconatearthroscopiesautochthonousaerobiologiesailurophobiasaldosteronismantiauthorityanticorporateanticorrosionantiestrogensastrocytomataautoradiogram

About this list

Words
38 (10 common words)
Common example
acetaminophen
Rare example
autoradiogram
Doubled letters
10
Ending in S
12
Most frequent letter
I (31)

Questions

How many 13-letter words matching a_______o____ are there?

38. 10 of them are common words.

What is a common example?

ACETAMINOPHEN is among the common words in this set.