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.
pry prey pray parry perry peery pur per pro par proa pear pree puri parr pyre poor para pere pure pair peri prau peer pier pare pyro prow purr pour prao pore pareu pareo puree poori hyper perea parae pariah peerie pereia