hepaticas, cadetship, peachiest, cathepsin, poachiest, chapiters, pastiches, pistaches, patchiest, whitecaps.
Your query has returned 327 words, which include anagrams of pistache as well as other shorter words that can be made using the letters included in pistache.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.