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.
googly goggly googol goggle gaggle guggle cockily gawkily guaiacol
googly golly wiggly ugly wriggly niggly mogul agly jiggly coly coolly cooly coyly gley colly coaly agley baggily bigly bogle foggily fuggily giggly goggly googol muggily ogle soggily waggly shaggily