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.
pierrot parrot pert parroty peart pirouette protei period protea periti yperite proette prod prat part port proud party pride perdy purty perdu pruta pried pyrite purred prutah parody pardie purity perdie parity perdue paired parred pirate pretty peered parodoi parried peridia
pierrot ferret heriot carrot carroty garrote parrot parroty terret territ cheroot sheroot rot