disparate, aspirated, crispated, practised, disparted, therapsid, preadmits, predatism, misparted, spermatid, dipterans, preaudits, eupatrids.
Your query has returned 487 words, which include anagrams of rapidest as well as other shorter words that can be made using the letters included in rapidest.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.