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.
gar gaur guar car gor grey gree gore grow grew guru grue gray goer gory carr care kauri quare kaury gurry karoo guiro carry gooier karroo quaere quarry