12-Letter Words Matching ____A___S___

There are 22 12-letter words that match ____A___S___. 8 are common words, such as CASUALNESSES and DICTATORSHIP. A rarer one is VENIALNESSES. 10 words contain a doubled letter.

Full list 22

casualnessesdictatorshipextrasensoryidolatressesleopardessesnonpartisansoutlandishlystewardessesdermabrasionfrugalnessesvillainessesaggrandisingbastardisingdismalnessesextraversionformalnessesgormandisingguitarfishesjeopardisingoverarousalssympathisingvenialnesses

About this list

Words
22 (8 common words)
Common example
casualnesses
Rare example
venialnesses
Doubled letters
10
Ending in S
12

Questions

How many 12-letter words matching ____a___s___ are there?

22. 8 of them are common words.

What is a common example?

CASUALNESSES is among the common words in this set.