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.
cesium zoecium zooecium seism sesame
caesium hassium cesium sum sim misaim zoecium sima sumo assume aecium possum museum coassume reassume resume fusuma passim zooecium
cease cees cess aces easies ices cosies resize ceases cesses chesses