According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 18 words with the pattern
-AS--A--S. That is, nine letter words with 2nd letter A and 3rd
letter S and 6th letter A and 9th letter S. In alphabetical order,
they are:
baseballs
basebands
baselards
casemates
cashbacks
castrates
castratos
eastwards
fastbacks
fastballs
gastraeas
hashmarks
mashiachs
passbands
pastramis
sasararas
washballs
washlands