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.
padi pad paid podia paddy pattie payday pit pud ped pod pat pita paty pied peed ptui peat pood pity pate hyped patty peaty petti pieta piety pitta pooed putti
cadi gadi kadi qadi padi sadi wadi ad