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.
coky cooky cocky cookey caky cock coke cook gooky kooky cakey kicky quacky cookie cog cake guck gowk coca keck kick cuke coco gook kook cacao cocoa gawky guaco quack quaky quick
hooky joky coky cooky gooky kooky nooky poky rooky choky