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.
petti petto petty putti pet puttie pattie peat putt ptui poet potty pitta putto pieta peaty piety putty potto patty pattee puttee put ped pat pot pit pate pied pita pity padi paid pout paty peed
petti cattie yeti tittie sett etui fouette ghetto hottie jetty betta netty nett pattie petto petty putti puttie retie tattie tutti yett