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.
giggly giggle jiggly gigolo jiggle joggle jokily juggle
giggly jiggly wiggly wriggly goggly waggly niggly boggle agley haggle higgle muggily gaggle giggle jiggle miggle juggle niggle raggle ugly daggle goggle agly baggily joggle fuggily foggily guggle wriggle gley soggily bigly toggle waggle googly wiggle shaggily