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.
peat peaty pat pet poet paty pate piety petti petty petto pieta patty pattee pattie put ped pad pot pit padi ptui putt paid pita pied pout pity peed paddy pitta podia pooed potto potty pouty hyped putti putto putty
beat eat feat heat meat neat peat seat teat wheat cheat at et