I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
realm relume
realm elm whelm celom palm halm palmy malmy qualmy kelim gleamy coelom calm helm haulm halma fleam malm elmy alma balmy balm baalim alum alme gleam kalam qualm velum salmi shalom
real realia really prelaw oral rail rale rally rawly reel relay rely areal areally earl early rial orally riel ureal