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.
carcase carcass cariocas caracks carex curacoas carks carracks crocs crocks crucks cricks cracks cargos crocus cargoes karaokes crags corks crakes creaks creeks croaks crooks quarks croquis
carcase gearcase arecas barcas ericas fracas verrucas carcass maracas myricas narcose orcas