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.
loudish loutish laddish latish
loudish dudish dish toadish radish oddish modish maidish maddish loutish kiddish kaddish caddish jadish faddish dishy reddish laddish goodish widish
loud alodia aloud cloud cloudy