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.
agnate aconite aquanaut acned acnode
connate quinate magnate lacunate shogunate agnate cognate diaconate taconite kente reignite quinte gahnite kainite connote coontie aquanaut cuneate conte gunite lignite keynote picante qanat ignite aconite quinnat