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.
painch pinch paunch panache panocha panoche paunchy punch poncho punchy penoche penuche penuchi punish
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
pain pan pin pinnae spinny pinna spine piney span pine epinaoi pina piny piano pein pian pean pawnee pawn panne pane pinny pion opine spin spinney spiny