beginner, choreograph, father, founder, groundbreaker, innovator, mover, pioneer, prodigy, proposer, suggester, trailblazer.
Your query has returned 875 words, which include anagrams of mastermind as well as other shorter words that can be made using the letters included in mastermind.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.