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.
polka palooka pollack pollock plack plica pluck pulik plague plaguy plaque plicae plucky pealike plaguey plug
polka folk folky holk ilka palooka talooka taluka yolk yolky
pol poilu pole polio poll pollee polo poly pool apollo