What are some nine letter words with 1st letter P and 3rd letter E and 4th letter R and 6th letter D?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern P-ER-D---. That is, nine letter words with 1st letter P and 3rd letter E and 4th letter R and 6th letter D. In alphabetical order, they are:

pieridine

pteridine