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