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