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.
quaggy quagga quag quaky quacky quack quake quokka gag
baggy saggy raggy naggy shaggy faggy quaggy jaggy wiggy jagg dagga jiggy biggy boggy ragg vuggy moggy foggy muggy piggy buggy quagga puggy loggy soggy leggy doggy fuggy eggy
quagga quag quaggy qua quai quay aqua aquae quack quacky quake quaky squaw