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.
sadly saddle seedily setal sidle stale stall steal sedile seidel steely stilly sootily
badly madly deadly sadly diddley totally beadily dowdily gaudily fiddly rudely medley bawdily tally duly dually goodly dally hadal moodily shadily weedily modally giddily bodily muddly neatly nodally oddly patly puddly readily reedily ridley rowdily ideally seedily tiddly coitally lewdly waddly muddily tidally nudely daily vitally headily idly caudally featly cuddly godly ladle loudly needily tidily redly feudally beadle medially ruddily ritually retally radially widely piddly padle fatly mutually fatally diddly shoddily
sad sade sadi said tsade tsadi