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.
shuttle chattel chattily chital chaetal shadily
cuttle guttle shuttle tittle kittle whittle utile title dottle rutile pottle outlie mutule mottle mettle little kettle tattle cattle wattle vittle futile fettle butle bottle battle nettle pettle rattle settle cuittle
shut shittah shitty shott shout shute