apterous, postured, proudest, sprouted, superhot, roupiest, upstroke, poulters, troupers, posturer, resprout, outpress, spouters, postures.
Your query has returned 209 words, which include anagrams of spouter as well as other shorter words that can be made using the letters included in spouter.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.