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.
perdy pardy perdu parody period peered perdue perdie peridia prod pert pard proud peart pored pared party pried purty pardi purda preed pardee parred purity pardah purdah periti paired parity pretty pardie poured pureed purred parodoi parried parroty pierrot yperite priedieu part port prat
nerdy perdy ready corody corrody curdy greedy grody queered jerid nerd reedy sered tiered weirdy cheered sheered leered pardy herd parody veered bready beard lardy merde jeered hardy perdu heard peered cered tardy weird wordy cherty sherd
per pear peer peerie peery pere perea pereia peri perry pier aper apery opera