fear, frae, fare, fere, free, reef, fire, rife, reif, kerf, fern, fore, froe, serf, refs, fret, tref, reft.
Your query has returned 6 words, which include anagrams of erf as well as other shorter words that can be made using the letters included in erf.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.