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.
eunuch
eunuch finch quench lunch nucha ancho conchy bunch bunchy bench punchy rancho raunchy poncho cinch penuchi dunch paunchy wench painch chinch manche nautch honcho ranch kench launch concha conch concho inch hunch cancha punch raunch haunch pinch wrench penuche synch paunch tench munch winch lynch chinchy