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.
periodid parodied prided periodate parotid peridot prodded parotoid preedit proteid preaudit prettied proteide parted ported prated prutot
periodid fordid cardioid parodied sordid
period perdie peridia periti yperite