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.
finesses fewnesses feynesses finises vainnesses vinasses fiances faiences fiancees fences fancies venuses vinaceous
nesses vainnesses waenesses leannesses newnesses feynesses meannesses woenesses duenesses gaynesses wrynesses nownesses keennesses rawnesses lownesses coynesses dunnesses shynesses gooeynesses finesses fewnesses lionesses wannesses vinasses tenses gneisses joneses kneesies kineses senses lenses uneases geneses censes menses
fines finesse fins fanes finis finos foins vines