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.
kaes kas kays keys kues kaas gaes keas koas kos gas kis gays goas case koss kois casa goes caws cues gaze kiss cays kissy quays gawsy quasi cause gauze kusso guess gassy quais kazoo quass gauss queys
haes gaes kaes maes waes as es