According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 12 words with the pattern P--H--E--. That is, nine letter words with 1st letter P and 4th letter H and 7th letter E. In alphabetical order, they are:
pachyderm
pachytene
pathogene
pathogens
pathogeny
phthalein
pithiness
poshteens
potholers
pushiness
pushovers
pythoness