advance, betterment, changeover, conversion, degeneration, improvement, pyrolysis, retrogression, strengthening, sublimation, transition, weakening.
Your query has returned 884 words, which include anagrams of transmutation as well as other shorter words that can be made using the letters included in transmutation.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.