falsie, felsic, felids, fields, elfish, filles, elfins, filose, filers, lifers, fliers, rifles, flites, fliest, filets, stifle, itself, fusile.
Your query has returned 32 words, which include anagrams of felis as well as other shorter words that can be made using the letters included in felis.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.