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.
carcel carousel coarsely carrousel cresol cresyl creosol carousal crousely coryzal crassly crazily crissal crossly crusily
carcel marcel parcel tercel tiercel fiercely hirsel morsel dorsel hydrocele triscele wurzel
carassow carrs scarious caress caries carious carouse carries cares carse cars coarse croci acarus scarce scares scariose scars