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.
hoorahs horahs hoorays horas hurrahs horsy hoers hoars horse hours houris harass hoarse horsey hurrays hers hears heres heros hires heirs hares haars hairs hearse haeres hirees heroes heresy harissa harries harrows hearsay heiress herries hurries
hoorahs horahs torahs choreas hurrahs norias boras boreas forays pharaohs hoorays horas dourahs gerahs jarrahs koras moras morass morays sirrahs surahs douras pariahs soras toras shariahs ras ors
hoorah hooray hora horah dhoora