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.
toddy tody teddy toady today tod toad tidy toed didy dowdy deedy daddy duddy doody did ted dad tad tot dud tatouay duty tote toit dead died teed deed tide dada doty dude dodo tied toot dato duad tout
noddy soddy shoddy toddy odd woody waddy boody muddy hoody faddy neddy eddy buddy caddy daddy doody duddy toady body ruddy biddy rowdy howdy kiddy midday fuddy baddy didy moody dowdy goody teddy today giddy paddy tody widdy cuddy middy
toddy tod odd noddy soddy teddy toad toady today tody toed