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.
nuncle noncola nonequal
nuncle uncle bangle pinnacle monocle panicle nuclei angle ankle mangle binnacle pungle dongle dangle tincal sanicle tinkle wrinkle knuckle bungle winkle nickle pinocle jangle ingle runkle inkle penuckle mingle binocle jungle jingle funicle tunicle manacle rankle dingle single tangle cenacle tingle wrangle wangle shingle