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