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.
cud cued cuddy coude cad cut cuddie cod kudo quad cade guid quid cadi caid coda kudu gude code quod coed gaud cute cutie gaudy cutty cooed caddy cutey guide caddie codeia cooeed coteau queued