According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 11 words with the pattern
--PPI--S-. That is, nine letter words with 3rd letter P and 4th
letter P and 5th letter I and 8th letter S. In alphabetical order,
they are:
dippiness
happiness
hippieish
hippiness
lippiness
nappiness
nippiness
peppiness
sappiness
soppiness
yuppieish