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.
defines defiance deafness daffiness deveins divines defense defence deafens deviance dauphines diaphones devons dovens divans davens diaphonies daphnes tiffins dauphins deviancy divinise divinize tiffanies diaphanous
affines fines refines defines fins fanes caffeines coffins leafiness muffins puffiness finis ravines bovines ruffians biffins savviness finos tiffins foins goofiness dauphines savines caffeins bowfins miffiness heaviness ovines huffiness puffins iffiness vines boffins daffiness deafness beefiness divines waviness