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.
franc frank pharaonic faring firing fairing fearing freeing furring phrenic gheraoing
franc crank uranic trank puranic prank prang parang ourang orang frank rang bronc brank barranco barranca wrang rank drank tranq shrank
fern ferny firn fraena frena furan furane