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.
kern kerne kirn karn krona quern korun kroon koruny koruna krooni grin carn gran corn curn groin krone carny crown green grain crony grana garni groan corny cairn grown croon cornu
ern fern wyvern hern kern quern tern