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.
guacharos guacharoes gaucheries gushers catchers coachers cochairs couchers quashers cutcheries kashers cashiers
guacharos chars chairs charas chares charros charrs chiros eucharis cochairs guacharoes ochrous