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