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.
curd cured curdy curred crud curt cred cord card curried court cared crowd credo gourd curet caird creed cried cored crude guard cardio caried quired crowdy cardia gourde curite corody curate cruddy corrody queered corrade curette cardiae corrida crowdie carried corrode querida queried crit grad grid cart quarried carat caret gored grade greed gride grody carte kurta quart crate cruet garda quirt
burd curd gourd nurd surd turd urd
cur cure curia curiae curie curio curr currie curry