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.
pard pared pardi pardy paired parade pardah pardee pardie parody parred prod part parodoi parried pored peart pride party proud perdu purda prude perdy pried preed poured purred period purdah perdue perdie peered parity parrot pureed parroty pert port prat priedieu prate pruta purty
bard card shard board fard hard heard hoard beard lard guard liard nard pard sard ward chard yard
par para parae pare pareo pareu pariah parr parry