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.
cansos conscious conioses coniosis gainsays guanases coynesses gaynesses kanzus concise kenosis kinases kineses kinesis quinsies
cansos gneissose hansas hanses lenses manses mensas menses rinses censes census senses tenses
cans canso cains canes cannas canoes cons scans