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.
partite partied partita parted parotid parroted prettied parotoid parodied ported prutot prated prided pirouetted paraded pirated predate preedit proteid preaudit proteide periodate peridot prodded
partite ratite cordite curtate merited partied partita sortied zaratite dirtied worrited
part pardi pardie parity parried party peart apart sparid