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.
zedoary cedary cedar sudary ceder seder story sudor seater seeder starry stoury seedier sudaria zootier
zedoary dory dairy deary diary dowry feodary feudary votary notary rotary cedary sudary cheddary dor dry