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.
putto putt potto putty petto putti put puttie puttee pout pouty patty petty potty petti pitta pattie pattee ptooey pod pit pot pud pat pet pate paty peat pita pity poet pood ptui
putto buteo tutti ditto sutta putty putti potto butt butte butty ghetto jutty auto gutta gutty lotto motto mutt nutty otto petto putt cutty rutty datto tattoo tutty