15-Letter Words Matching __A___A________

There are 20 15-letter words that match __A___A________. 5 are common words, such as CHANGEABILITIES and EGALITARIANISMS. A rarer one is TRANSVALUATIONS. In this set, T is the most frequent open letter (18 words). 9 words contain a doubled letter.

Full list 20

changeabilitiesegalitarianismselaboratenessesinanimatenesseswhatchamacallitgravitationallyimaginativenesstranslatabilityanalyzabilitiescoagulabilitiesdiagonalizationgrandparenthoodimaginarinessesmeasurabilitiespharisaicalnessreasonabilitiestransparentizedtransparentizestransparentnesstransvaluations

About this list

Words
20 (5 common words)
Common example
changeabilities
Rare example
transvaluations
Doubled letters
9
Ending in S
14
Most frequent letter
T (18)

Questions

How many 15-letter words matching __a___a________ are there?

20. 5 of them are common words.

What is a common example?

CHANGEABILITIES is among the common words in this set.