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.
gul gull gully guile gulley gal glue goal cull gall gaol gale glia glow glee gley gala caul quail quill quale gayly galah quell golly cully gluey gally gaily galea quoll coulee cullay galeae galley goalie qualia quelea