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.
cheeriest chariest sheerest charriest christy christie characid shoreside
beeriest fieriest eeriest leeriest veriest aeriest cheeriest goriest chariest furriest miriest hoariest hairiest verist searest merest weariest driest teariest nearest sorriest airiest querist burriest wiriest wariest tarriest merriest dearest serest firriest leariest priest queerest mooriest wriest charriest sheerest rest erst
cheerios cheeros cheers cherries