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.
gaol gal gala goal gall gale gaily gally galah golly galea gayly goalie galeae galley gul col coly glee kail cole gley kohl coal coil kolo gull calo glow kola kale cola koel caul call glue cool cowl glia coyly quale gully coala guile quail koala gluey cooly colly coaly calla quoll