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.
idly idle idol idyl ideally ideal idyll
badly madly tiddly deadly sadly redly puddly piddly oddly muddly loudly fiddly lewdly goodly godly cuddly idly diddly waddly