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