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.
poet pet pot pout peat potty pieta petti piety peaty potto petty pouty pooed petto hypoed ptooey pit put pat pod ped paty pate pity pita pied peed ptui putt pood hyped patty pitta podia putti putto putty