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.
radiated redated reedited rotated ratatat
mediated radiated stated sedated reedited tauted dauted coedited caudated iodated ideated edited audited toited teated mutated dated doited doated dieted dawted guttated meditate nidated nutated tatted notated redated rotated situated statued
radiate radioed readied eradiate gradate