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.
race rice raze rase racy razee raise wrasse res ras razz rees rias rays rais rise reis ruse rose roes rues raws roues resee resay rouse resew roose reuse resow resaw raias wries
ace face lace mace pace peace race dace tace