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.
nettly neatly nettle nattily nuttily knottily nudely needily natal notal needle nautili nodally
nettly rattly meatily fettle little kittel quietly fatly fattily guttle meetly fitly vittle motley nuttily nattily patly pettle mutely rattle ruttily sootily dottily doughtily tattle tittle wetly whittle wittol chattily nettle featly lately pettily kettle kittle cuttle cutely goutily cattle cuittle bottle cattily hotly neatly outlay knottily mottle pottle mettle haughtily battle settle dottel dottle tattily tautly wattle whitely wittily chattel shuttle
nett netty net natty neat newt nitty nutty