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.
catalyze catalase cataloes cattaloes catalos cattails cattalos coatless coattails caudles cuttles cadelles cuittles gateless
catalyze dialyze dialyse dualize autolyze feudalize photolyze vitalize idealize metalize mutualize ritualize totalize
catalo cattail cattalo cattle octal