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.
gauze gaze gauzy gaes guess guise gazoo gauss cause causey gawsie gussie gas case cues gays goas goes guys kaes kues quiz
gauze baize daze razee faze feaze fuze fuzee haze cause gauzy gaze laze maize maze pause piazze raze sauce tazze