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.
pelt pellet pelite pelota plot plat plait platy poult palet pleat pilot pealed pallet pullet peeled piolet plotty polity paleate pullout palette pileate plod pallette pled paillette paled piled plaid plate plead plied poled puled
belt felt gelt kelt melt knelt pelt celt delt welt