According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 14 words with the pattern
-O-S---SS. That is, nine letter words with 2nd letter O and 4th
letter S and 8th letter S and 9th letter S. In alphabetical order,
they are:
boastless
bossiness
goosiness
horseless
horsiness
houseless
looseness
lousiness
moistness
mossiness
mousiness
noiseless
noisiness
worseness