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.
curn curran carn corn carny crony crone corny quern crane cornu crown cairn croon corona cornea crania carney cranny gurney careen carina carnie cornua cairny carrion guarani coreign guarana carinae coronae karn kirn kern gran grin kerne kroon krone krona korun groan grown groin green grain garni grana
bourn burn curn mourn durn turn urn churn yourn
cur cure curia curiae curie curio curr currie curry