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.
zapateo zaptieh spate sapote zapped spat spite spait spaed spado spade sapota sapped soaped sopite speedo zipped
zapateo pate opiate pupate spate pat