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.
keys keas kays kaes kues queys cooeys kos kas kis gaes kiss coys cays gays koas cues kaas kois goys koss goes guys cosey cozey guess kissy kusso quays
beys hooeys joeys cooeys keys queys leys looeys deys wheys es