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.
potto putto potty petto pot poet putt pood pout pooed petti pouty putty patty pitta petty putti pattie puttie pattee ptooey puttee pod pet pat pit put pate paty peat pita pity ptui
lotto otto potto motto ghetto chott photo dotty jotty datto cotta roto koto potty bott kotow lotte putto mott rotte motte ditto knotty tattoo petto shott