12-Letter Words Matching A_____O_____

There are 60 12-letter words that match A_____O_____. 19 are common words, such as ABORTIONISTS and ACCOMMODATED. A rarer one is AZATHIOPRINE. In this set, I is the most frequent open letter (57 words). 13 words contain a doubled letter.

Full list 60

Common words

abortionistsaccommodatedaccommodatesadditionallyadvertorialsanachronismsanthologistsanthologizedanthologizesantiabortionantiphonallyarchdiocesan
abortionistsaccommodatedaccommodatesadditionallyadvertorialsanachronismsanthologistsanthologizedanthologizesantiabortionantiphonallyarchdiocesanarchdiocesesastrologicalastrologistsastronomicalasymptomaticaudiologicalaudiologistsaccessorizedaccessorizesallotropicalalphitomancyamblygonitesamphibolitesamphicoelousantherozoidsapochromaticapostrophizeapotheosizedapotheosizesarchaeologicarithmomancyasymptoticalautoerotismsaccessorisedaccessorisesaccommodatoradoptionismsadoptionistsafficionadosambitionlessanacreonticsaneuploidiesanorthositesanorthositicanthologicalanthologizeranticlottingantieconomicantiglobulinantiozonantsantiviolenceapostrophisearabinosidesarchegoniatearteriogramsautotrophiesauxotrophiesazathioprine

About this list

Words
60 (19 common words)
Common example
abortionists
Rare example
azathioprine
Doubled letters
13
Ending in S
29
Most frequent letter
I (57)

Questions

How many 12-letter words matching a_____o_____ are there?

60. 19 of them are common words.

What is a common example?

ABORTIONISTS is among the common words in this set.