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.
coir cor core cory cooer coria cowry cowrie gooier corrie kir cry kor car cru cur gor goer kore gore kora keir crew gory kier crow curr carr cure craw care carry curia curie curio curry guiro korai quire