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.
horary horror hoarier hirer hearer hairier harrier hurrier
horary friar urari dreary ourari orrery curari curare curara friary briary rare briar aurar arrear ariary roar rear drear urare woorari
horah hora hoar hoary hoer hoorah hooray hour houri