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.
clotty clot culotte calotte cloot clout cloddy cloudy clod colt cult kilty glout culet culti cloud gloat cleat guilty gleety galoot galiot cullet collet callet collate colloid galette galliot galloot quality
blotty clotty plotty lotte lotto blotto floaty jolty calotte culotte slitty slutty zloty