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.
inch
bench quench winch tench synch wrench ranch pinch paunch painch munch lynch lunch launch kench bunch conch inch hunch haunch finch punch raunch cinch dunch wench chinch