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.
kinesis kineses kinases kenosis keennesses quinces coniosis gainsays quinsies coynesses gaynesses cansos kanzus gooeynesses concise
genesis kinesis synesis gnosis kneesies noesis enosis geneses joneses kenosis kineses hypnosis sanseis senseis zoonosis
kines kins kains kanes kinas kinase kinos koines skins