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.
panaceas pinnaces ponces pinaceous pansies pounces penises pensees hypnoses
panaceas fiances hances lances lunacies menaces nances nuances pinnaces rances seances dances tenaces chances