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.
pereion pereon prion pernio perron hyperon purin prone preen parian pyrone pyrene perinea pirn porn porno porny prawn pyran pirana purana
pereion rein whereon turion serein reign briony foreign virion herein hereon carrion coreign morion morrion murein pereon prion durion wherein chorion rin
pereia pere peri peerie perea per