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.
feyness fewness fens finesse fanes fence fines venues foehns faenas fannies faience funnies fins fons fans funs vainness veins finis fawns fohns venus fauns foins fanos vanes finos vines faunas phones veenas venose venous fiancee hyphens phoneys phonies vinasse
coyness gooeyness feyness shyness wryness gayness ness woeness gneiss waeness fewness dynes leanness dueness vainness keenness rawness lioness finesse dunness meanness tynes newness wanness nowness lowness