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.
hayride hard harried hared horde heard hoard horrid haired hairdo herried hurried hart herd hardy heart hired hearty heired hereto heriot
hayride joyride ride triode hydrid boride bourride bride hybrid joyrode gride myriad oreide oroide pride pyrite deride hydride ureide rid