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.
chuddahs chetahs cheetahs chads chats cheats chides chutes shoddies shittahs chateaus chits shads sheds shuts chotts shades shoats shouts shutes
chuddahs keddahs dahs houdahs howdahs middays odahs whidahs whydahs