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.
peer peery per peerie peri pree pear pere pier hyper perry puree perea pereia pro pur par pry pyre prao prow puri proa prey pray poor pour pare pure pair prau para parr purr pore pyro parae pareo pareu parry poori
beer veer jeer queer leer peer seer deer weer cheer sheer er