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.
pardon parton pardine partan proton protein pyridine peritonea pieridine hypertonia pertain predawn preteen protean puritan
bourdon guerdon lardon cardon pardon cordon cardoon teardown burden parton harden lurdan foredone bridoon fordone redone carton radon garden burton gueridon verdin lardoon jordan bradoon drawdown redon warden
pard pardi pardie pardy pardah pardee prude peart parried parodoi paired purdah pride apart perdue part sparoid spared sparid parody parade parity parroty perdu perdie perdy purda parrot parred pared party prod sparred