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.
cardio cardia card cardiae credo cared caird gardai carrot caried carroty crowdie carried cred crud cord cart crit curd crowd carte garda griot cored crude creed cured guard cried caret carat curdy garote croute corody carate garred curite crowdy cruddy curred quarto corrode corrody cowrite cowrote curried garotte garrote corrade garrotte quarried
cardio radio weirdo uredo tardo period pardie ordo redo riot birdie burdie burrito fordo foredo hairdo heriot giardia cardia credo gardai griot pardi perdie dorado teredo weirdie chariot
car care carr carry acari scar scare scarey scarry scary