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.
parodoi pardi pardie parody prod pard proud pared pardy period protei perdie pardee parade parrot pardah parity parred paired parried parroty part priedieu perdy pored preed party prude perdu pride peart pried peered pyrite purity pureed purred poured protea perdue periti pierrot proette yperite