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