According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 16 words with the pattern
P----TIS-. That is, nine letter words with 1st letter P and 6th
letter T and 7th letter I and 8th letter S. In alphabetical order,
they are:
palletise
pedantise
pedantism
pelletise
phonetise
phonetism
phonetist
potentise
predatism
prelatise
prelatish
prelatism
prelatist
privatise
privatism
privatist