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.
pupate paupiette pupped puppet pipette piped pipet pipit peeped pepped pipped pooped popped poppet poppied
pate pupate spate pat capote chapati cowpat depute opiate spite paty peat spait sapote spaed spat repeat sopite zapateo repute tiptoe spade chappati