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.
cancha concha conchae conch concho conchy conchie ganache kench quench
concha cancha honcho hunch inch conch conchae conchy haunch quench lunch paunch painch pinch punch ranch raunch wrench synch tench wench chinch manche finch eunuch panocha bunch bench ancho nuchae nucha concho bunchy kench launch munch lynch paunchy poncho punchy rancho raunchy cinch dunch uncia winch chinchy
can cain cane canna cannie canny canoe scan chaconne