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.
kays kas gays keys cays kaas kaes keas koas quays gas kos kis case koss goas guys kois casa goys kiss coys kues gaes caws gauzy kusso quass cause gassy gauss gawsy kazoo quais quasi kissy queys
ays bays shays ways says rays pays nays mays lays quays kays gays cays jays hays fays days chays yays as