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.
cardia cardiae cardio card cared garda caird carat gardai carate caried carried crowdie cord curd cart crud crit cred cured cored cried crowd credo caret carte guard karat crude creed curdy karate cruddy crowdy carrot corody garred curite curred carroty corrade corrode corrody cowrite curried quarried
giardia cardia uredia purdah peridia pardie redia rediae birdie burdie cardiae cardio corrida garda gardai querida lariat myriad pardah pardi perdie purda triad weirdie
car care carr carry acari scar scare scarey scarry scary