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.
missense missions mizens messans mizzens mossiness mussiness messiness massiness masons mesons mucins missionize maziness muezzins mousiness muzziness mesnes
sense missense cense sensa sensei essence hausens caseins cassenas cassenes lessens license licensee loosens osseins