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.
charriest chariest cheeriest christy christie characid sheerest chorused chorussed shoreside
burriest firriest charriest merriest tarriest sorriest furriest wariest leariest airiest hairiest mooriest rarest arrest wiriest eeriest beeriest goriest priest miriest wriest fieriest rearrest veriest driest hoariest teariest aeriest weariest leeriest chariest cheeriest rest