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.
pat peat pate paty patty peaty pet pattie put pad pit pattee pot putt padi ptui pita pity pout paid poet putto putti petti petty paddy petto pieta piety podia potto potty pouty pitta putty payday ptooey puttee puttie