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.
ranch rancho raunch raunchy wrench
ranch haunch quench concha conch concho inch hunch cancha punch raunch pinch natch wrench paunch snatch painch dunch manche wench lunch chinch ganache honcho finch rancho kench launch ancho bench conchy bunchy eunuch bunch punchy raunchy nacho poncho cinch paunchy synch panache tench munch winch lynch chinchy
ran bran tranny rainy ranee rani roan ruana rain crane branny crania cranny gran grana grannie granny urania