saithe, itches, ethics, histed, fetish, eights, kithes, theism, theins, theirs, shiest, heists, thesis, theist, tithes, tushie, whites, withes, swithe.
Your query has returned 36 words, which include anagrams of sithe as well as other shorter words that can be made using the letters included in sithe.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.