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.
rowdily readily reedily ruddily redly radially ridley redial radial rudely ruttily radiale rotl radialia ritually rutile riddle retile raddle retail rootle ruddle radula retool reddle rattly ritual radulae rattail retally
bawdily rowdily dowdily headily shadily ruddily tidily daily dilly doily beadily bodily giddily lewdly moodily muddily needily readily reedily seedily gaudily weedily shoddily
roadie rowdy crowd crowdie crowdy rod