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.
res roes rees rues reis resaw resee roues wries resow resay resew reuse reseau ras reissue rose raze rosy rais rise rase race raws rays rice ruse rias rows raias raise razee roose rouse wrasse