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.
tod toad toed tody toady today toddy tot ted tad tout dodo teed dato tide tidy tied toot toit tote teiid doody diode datto dowdy ditto teddy wyted doodoo tattoo