What are some nine letter words with 5th letter E and 6th letter R and 9th letter P?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern ----ER--P. That is, nine letter words with 5th letter E and 6th letter R and 9th letter P. In alphabetical order, they are:

buttercup

fingertip

hammerkop