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.
caeca caca cacao cake cakey caique caky coca cock coco coke cuke gaga kaka keck
caeca vacua cacao macaw paca ceca decay
caeca caca cacao cake cakey check