15-Letter Words Matching _O___A_________

There are 27 15-letter words that match _O___A_________. 11 are common words, such as CONFRATERNITIES and CONGRATULATIONS. A rarer one is POSTVACCINATION. In this set, N is the most frequent open letter (25 words). 10 words contain a doubled letter.

Full list 27

Common words

confraternitiescongratulationscontraindicatedcontraindicatesfoolhardinesseshonorablenesseshotheadednessesmountaineeringsnonavailabilitynontransferablepopularizationscontractibility
confraternitiescongratulationscontraindicatedcontraindicatesfoolhardinesseshonorablenesseshotheadednessesmountaineeringsnonavailabilitynontransferablepopularizationscontractibilitycontractilitiescontradictorilycontravallationmonosaccharidespolysaccharidescontradictoriescontrapositionscontrapositivesmountainousnessnonflammabilitynonquantifiablenonquantitativenonstationariespostmastershipspostvaccination

About this list

Words
27 (11 common words)
Common example
confraternities
Rare example
postvaccination
Doubled letters
10
Ending in S
17
Most frequent letter
N (25)

Questions

How many 15-letter words matching _o___a_________ are there?

27. 11 of them are common words.

What is a common example?

CONFRATERNITIES is among the common words in this set.