9-Letter Words Matching ____O___A

There are 45 9-letter words that match ____O___A. 9 are common words, such as COGNOMINA and COLLOQUIA. A rarer one is STOMODAEA. In this set, I is the most frequent open letter (28 words). 2 words contain a doubled letter.

Full list 45

Common words

cognominacolloquiaconsortiadiplomataharmonicainamorataphenomenasarcomatasignorinaanchovetachipolatacosmorama
cognominacolloquiaconsortiadiplomataharmonicainamorataphenomenasarcomatasignorinaanchovetachipolatacosmoramacycloramaeuphorbiafibromataiminoureamyelomataneurogliapaulowniaperiosteaprotonemarauwolfiasantonicasenhoritaspirogyratreponemaadenomataandroeciaandromedaangiomatabousoukiabouzoukiacarbonaracoelomatadichondraexodontianeuromataosteomatapozzolanaprenominaprimordiarhizomatasantolinascotomatastomodaea

About this list

Words
45 (9 common words)
Common example
cognomina
Rare example
stomodaea
Doubled letters
2
Ending in S
0
Most frequent letter
I (28)

Questions

How many 9-letter words matching ____o___a are there?

45. 9 of them are common words.

What is a common example?

COGNOMINA is among the common words in this set.