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.
dot doit doat doty dote dotty dought dit tot doughty dado daut date toot tote dawt data deet duty duit dodo dido dato toit tout diet duet dite dita datto ditty deity doody dowdy diode ditto dautie dawtie doodoo