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