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.
caviar caviare caver covary cover kafir kaffir quaver quavery coiffeur coiffure
caviar var wavier savvier pavior navar levier fiar vair vara vary vier aviary vivary bouvier havior heavier jivier caviare covary leavier livier ovary savior devoir chivari