8-Letter Words Matching ____S__A

There are 13 8-letter words that match ____S__A. 2 are common words, such as ANTISERA and BABUSHKA. A rarer one is PIASSABA. In this set, A is the most frequent open letter (9 words). 5 words contain a doubled letter.

Full list 13

antiserababushkabrassicacalisayafenestramoussakapalestrapiassavaclaustraendosteaequisetaglossinapiassaba

About this list

Words
13 (2 common words)
Common example
antisera
Rare example
piassaba
Doubled letters
5
Ending in S
0
Most frequent letter
A (9)

Questions

How many 8-letter words matching ____s__a are there?

13. 2 of them are common words.

What is a common example?

ANTISERA is among the common words in this set.