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.
diaphones diaphonies daphnes dauphines diaphanous daphnias dauphins divans typhons defines divines deviance deafness defiance typhoons daffiness tiffanies davens devons dovens deafens deveins deviancy divinise divinize toughness
geophones diaphones phones phons syphons typhons diaphonies dauphines daphnes ciphonies sphenes siphons euphonies phonos phonies phoneys typhoons