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.
piety pity peaty petty pieta pit pet paty poet peat pita pied potty petto patty pitta pouty putty petti puttie ptooey pattie pat ped pot put padi paid pate peed pout ptui putt
moiety gaiety piety pity chitty pieta whity petty titty peaty diet nitty suety netty meaty mity laity quiet kitty jetty bitty city deity ditty whitey witty shitty