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.
cochairs coachers couchers coshers cashiers catchers guacharos cutcheries guacharoes koshers gaucheries
chairs cochairs mouchoirs guacharos chares charrs chars chiros chirrs chirus charas shares shears shiers shires shirrs eucharis cashiers choirs mishears cheshires
cochair coacher coucher cowcatcher