15-Letter Words Matching ____O__A_______

There are 27 15-letter words that match ____O__A_______. 2 are common words, such as COMFORTABLENESS and DISCOURAGEMENTS. A rarer one is VISCOELASTICITY. In this set, I is the most frequent open letter (23 words). 9 words contain a doubled letter.

Full list 27

Common words

comfortablenessdiscouragementshydrostaticallyphotoelasticityphototransistorariboflavinosesariboflavinosisbenzodiazepinescorporealnesseshydroxyapatitesmicroanalyticalmicroanatomical
comfortablenessdiscouragementshydrostaticallyphotoelasticityphototransistorariboflavinosesariboflavinosisbenzodiazepinescorporealnesseshydroxyapatitesmicroanalyticalmicroanatomicalneuroanatomicalneuroanatomistsneuroblastomataoverornamentingphonogramicallyphotogrammetricphytoflagellatephytoplanktonicpictorialnessesplutocraticallypreformationistretrogradationsschoolmasterishtrisoctahedronsviscoelasticity

About this list

Words
27 (2 common words)
Common example
comfortableness
Rare example
viscoelasticity
Doubled letters
9
Ending in S
11
Most frequent letter
I (23)

Questions

How many 15-letter words matching ____o__a_______ are there?

27. 2 of them are common words.

What is a common example?

COMFORTABLENESS is among the common words in this set.