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.
gaed gad gadi goad gate gaud gaddi gaudy gaiety goatee gateau guttae god cad gat coed quad gowd qadi caid cade cadi kadi guid gait gude goat good cate qaid cued caddy cooed goody guide gutta quate