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.
gardai garda guard cardio cardia garred cardiae grad grit card grid gourd greed carat cared grody griot krait gored karat gride grade caird garote karate carate caried greedy garret gritty gourde carried corrida crowdie garotte garrote querida garrotte quarried
gardai raid trait purda birdie braid burdie giardia cardia cardio corrida garda krait querida pardah pardi pardie perdie purdah weirdie