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.
coal coala coaly col coil call cowl coly cool cola caul cole calo goal coyly koala cooly colly calla coulee coolie goalie collie coolly callee callow gal clue clay cull kohl gaol clew gala kail gale koel kale kolo cloy kola gall claw gayly quale quail golly gaily gally galea galah cully quoll