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.
winch wench winish wennish
inch painch chinch pinch cinch winch finch kench launch lynch munch bunchy bench manche raunch lunch punch concha wrench ancho snitch dunch wench honcho eunuch hunch paunchy tench niche concho paunch conchy haunch quench raunchy bunch synch poncho cancha punchy conch rancho ranch chinchy
win wain twine dwine whin whine whiney whinny whiny wienie wine winey winnow wino winy gwine swine swinney twin twiny