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.
hoorays hoorahs horas horahs hurrays hours hoers horsy hoars horse hoarse horsey harass houris hurrahs hearsay hers heirs hires hares heros heres hears hairs haars heresy hirees heroes hearse haeres harissa harries harrows heiress herries hurries
hoorays morays forays rays trays torahs douras soras hoorahs morass koras grays hurrays horas horahs frays boreas boras bewrays arrays moras norias brays prays derays drays toras choreas ras ors
hoorah hooray hora horah dhoora