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.
greedy greed gored grody greet creed garred grid cred grad cured curdy cried garda cored grade guard gride grate credo gourd great cared crowdy caried gardai curred garote cruddy gourde grouty create corody quired garret grotty gritty carried corrody curried garotte garrote queered queried curette garrotte quarried
greedy reedy cheered tiered sered pureed perdy nerdy leered queered greed creed jerreed jereed jeered veered freed breed bready reed ready peered preed cered dreed treed sheered
gree gore grew grey grue agree geekier ogre reeker reekier