12-Letter Words Matching ____A____S__

There are 67 12-letter words that match ____A____S__. 25 are common words, such as AVITAMINOSES and AVITAMINOSIS. A rarer one is WORKAHOLISMS. In this set, I is the most frequent open letter (49 words). 17 words contain a doubled letter.

Full list 67

Common words

avitaminosesavitaminosiscasualnesseschivalrouslycontagiouslycourageouslydermatitisesenfranchisedenfranchisesextraneouslyfallaciouslygenealogists
avitaminosesavitaminosiscasualnesseschivalrouslycontagiouslycourageouslydermatitisesenfranchisedenfranchisesextraneouslyfallaciouslygenealogistsgregariouslyidolatressesleopardessesmendaciouslyminiaturistsoutrageouslyphilatelistsprecariouslyprotagonistspugnaciouslystewardessesungraciouslyuproariouslyaffranchisedaffranchisesagapanthusesastragalusesbilharziasesbilharziasisbiocatalystsfrugalnesseshelianthuseshistaminasesidolatrouslyjackanapesesloquaciouslymordaciouslyniphablepsiapolyandristspolyanthusesprobabilismsscarabaeusessequaciouslystomatitisesvillainessesvillainouslycalcareouslycollagenasescomparatistsdismalnessesformalnessesglutaminaseshellaciouslyhollandaisesmammalogistsmandarinismsoveranalysesoveranalysisprobabilistsrampageouslyresearchiststympanitesesumbrageouslyvenialnessesworkaholisms

About this list

Words
67 (25 common words)
Common example
avitaminoses
Rare example
workaholisms
Doubled letters
17
Ending in S
43
Most frequent letter
I (49)

Questions

How many 12-letter words matching ____a____s__ are there?

67. 25 of them are common words.

What is a common example?

AVITAMINOSES is among the common words in this set.