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.
tad toad toady ted tod tat dad toed tate dead tidy dada dita data taut teed tied duad dado tody teat tide today toddy daddy teiid teddy tatty wyted tattie tattoo