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.
lunacy lunas launce lance lunes lanais lauans lianas linsey lunies looneys
lunacy mincy wincey unsay tenace zincy pinnace nancy menace nays guanays gainsay jouncy fancy bouncy bonaci chancy
luna lanai lauan lune luny ulna ulnae