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.
conch concha concho conchy conchae conchie cancha kench quench ganache
conch finch launch lynch ancho bench kench bunchy eunuch bunch punchy rancho raunchy poncho cinch penoche dunch paunch wench panocha chinch munch notch honcho ranch quench lunch concho concha conchy inch hunch cancha punch raunch haunch pinch wrench paunchy synch panoche tench painch winch manche chinchy
con coin cone coney coni conn cony coon icon cocain cocaine cockney cocoon scone