What are some nine letter words with 1st letter P and 2nd letter T and 4th letter R and 8th letter N?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern PT-R---N-. That is, nine letter words with 1st letter P and 2nd letter T and 4th letter R and 8th letter N. In alphabetical order, they are:

pteridine