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.
newton niton neaten neoteny
newton ton baton tone atony atone town toon mouton phyton tony cottony betony piton ratoon rattoon cyton stone duotone jetton beton button bouton futon phaeton photon jeton cotton ketone buttony muttony muton mutton niton puton ratton rhyton seton stony chiton