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